- The broadcaster made the announcement via its Twitter page on Friday, just hours before the civilian show's live launch
- Alongside a teaser clip, the post said: 'The forthcoming series of Big Brother will be the last - of either celebrity or civilian versions - on Channel 5.'
- Bit On The Side spin-off show host Rylan Clark-Neal also took to social media to reveal he's 'saddened' by the news following his six-year stint
- The latest edition of CBB, which ended on Monday, saw soap star Ryan Thomas, 34, crowned as the winner following Punchgate scandal with Roxanne Pallett
- Fans bid farewell to the franchise on Channel 4 in 2010, after ten years on air
- It was brought to the UK in 2000 by British television giant Peter Bazalgette
- Viewers figures plummeted from an average of 5m in the early days to below 2m
Celebrity Big Brother and Big Brother have been axed after 18 years on British television, Channel 5 confirmed in a statement on Friday.
The broadcaster made the announcement via its Twitter page, just hours ahead of the live launch of the last-ever civilian series.
Alongside a teaser clip, the post said: 'The forthcoming series of Big Brother will be the last - of either celebrity or civilian versions - on Channel 5.'
The show, which was seen as a ground-breaking social experiment when it first aired in 2000, was initially a roaring success, with the final of the first series bringing in 9.45 million viewers.
But as the decade drew to a close viewers began switching off and switching over to other reality shows, many of them arguably spawned from Big Brother, such as The X Factor, Strictly Come Dancing and The Only Way is Essex.
Recent series have drawn in below two million per episode for both celebrity and civilian versions, with the final of the most recent run, broadcast by Channel 5 last year, watched by just 1.11 million.
It was responsible for dozens of memorable moments, including sitting MP George Galloway pretending to be a cat, a race row involving Jade Goody and Bollywood actress Shilpa Shetty and success for transgender contestant Nadia Almada in 2004.
Channel 5 added: 'We'd like to thank Endemol and all of the production team who have worked tirelessly to make the show a success.'
'We'd also like to thank our brilliant presenters - Emma on Big Brother and Rylan from Bit on the Side - for their consummate professionalism, Marcus, the voice of Big Brother and all of the housemates who have created so many memorable moments.'
'Most importantly, we'd like to thank fans of the show for their support over the last seven years. We look forward to giving the final series a brilliant send-off', they concluded.
Production firm Endemol has said there are 'possibilities' the show - originally brought to the UK by television production supremo Sir Peter Bazalgette in 2000 - could live on.
It said: 'We are incredibly proud of Big Brother which has consistently been the highest rated show for Channel 5 over the past seven years, with the latest series of Celebrity Big Brother being the channel's highest rating show of the year, growing its audience year on year by 17 per cent and tripling the channel's slot average for 16-24s.'It added: 'Big Brother continues to be a global phenomenon. The UK is one of 20 countries where the show will air in 2018, including the US where Celebrity Big Brother was recently renewed, four different versions in India and last month's Celebrity Big Brother in Germany which saw a rise of 85 per cent series on series.
'Whilst disappointed not to reach an agreement with Channel 5, the decision opens up a new chapter and we are excited about future possibilities for Big Brother in the UK.'
Former X Factor star Rylan, 29, took to social media site to share his thoughts: 'After 6 years working on one of the most iconic shows on television I'm saddened to hear the news Big Brother won't be returning. It has been the biggest privilege being a housemate, a winner and a host on my favourite show on the television.'
'To work with Emma, Marcus and the amazing team on BOTS every day and have made friends for life I'm truly the luckiest guy in the industry. I hope one day Big Brother will return but my focus now, as with the rest of the team is to make our last series the best yet.'
'I'd like to thank all of our guests, housemates and teams from over the years, Endemol and Channel 5 for having me and most of all the viewers for sharing this amazing journey. I learned how host a show on the job here and I'll forever be grateful for the opportunity. R x', he concluded.
Big Brother's official Twitter page posted a short teaser clip ahead of the hotly-anticipated premiere on Friday, which featured the words 'it's time for the game to end', and 'game over'.
Loyal viewers swarmed Twitter after hearing about the show's axe, with Nicola McLean, who appeared on CBB in 2012 and 2017, stating: 'Totally gutted @bbuk #cbb @bbbots_uk has come to an end.. I have been so lucky to be apart of it @Rylan @EmmaWillis @marcusBBbentley you are all amazing #cbb (sic).'
CBB 2014 contestant James Jordan praised Rylan for his work on the show: 'You've been bloody Amazing @Rylan !!!
'You was like a duck to water from day one, a true pro and with a great sense of humour. Good luck with your future endeavours because there will be loads (sic).'
Commending the show's inclusion of individuals from a range of ages, presenter Andy West commented: 'And now...The end is near...And so we face...The final shopping task.
'Bit worried the oldest housemate is 32. Our series would have been nothing without the older peeps. That's where half the comedy comes from! #BBUK (sic)'.
Glyn Wise, who came in as runner-up on 2006's edition of Big Brother, chimed in: '18 years @bbuk has been on our screens! So privileged to be part of its magic. Lliterally was a dream come true.
'Amazing tasks, parties and HM's and landing as R-UP. Would highly recommend! Those new HMs going in are in for a blast! Would do it all over again if I could #BBUK'.
Alongside a snap of his cover on Heat magazine, he continued: 'Nooo, sad news. @bbuk has come to an end. It was the show who made me who I am today. Loved all the tasks, the HM's and the experience. Grew up in that house. Thanks for making an 18 year old dreams come true. #BBUK'
The latest edition of CBB, which ended on Monday, saw soap star Ryan Thomas, 34, crowned as the winner of the series following his turbulent stint on the show, in which Roxanne Pallett, 35, accused him of 'deliberately' and 'repeatedly' punching her.
Last month, TV presenter Rylan hinted that CBB could move to another network as Channel 5's three-year contract came to an end.
In a recent interview on This Morning, the TV personality said: 'Truth is no one knows there's no secret Channel 5 had a three year deal...but what happens before is it just renews.'
According to The Mirror, the house at Elstree Studios could remain open for 'at least another three years as a planning application has been submitted to keep the house open until 2021.' MailOnline has contacted Channel 5 representatives for comment.
The news follows previous reports that both BB and CBB were on their way out, having enjoyed a rebooted run on Channel 5 after Channel 4 axed it in 2010.The format was seized by Channel 5 in 2011, when fans had bid farewell to it in 2010, following Channel 4's last ever series, titled 'Ultimate Big Brother'.
This saw winner of the last C4 civilian series, Josie Gibson, leave the house as the champion, only to be sent back in again to compete against former housemates from across the show's history.
This included CBB stars such as Ulrika Jonsson, Vanessa Feltz and Coolio, as well as civilian housemates such as Makosi Musambasi, Nikki Grahame and Brian Dowling. Davina McCall hosted both BB and CBB from 2000 to 2010.
Brian - who one Big Brother 2 - went on to win the show and was offered the job of host of BB when it returned the following year on Channel 5.The show returned in the summer of 2011, but kicked off with a new eighth season of CBB, with Big Fat Gypsy Weddings star Paddy Doherty taking the crown.
Following this, the 12th season of civilian BB launched and was won by Aaron Allard-Morgan in November 2011. It appears this year follows the same format of CBB first and BB straight after.
Meanwhile, Dowling's stint as the show's host lasted two years and he was replaced by Emma Willis who continues to host the show today. BREAKDOWNS, CAT IMPRESSIONS AND RACE ROWS: THE CONTROVERSIAL AND MEMORABLE MOMENTS FROM BIG BROTHER OVER THE YEARS
Big Brother season one - 2000
Winner: Craig Phillips from Seaforth, Merseyside. A staggering 3.5million people voted for the Liverpudlian to win. The then 28-year-old builder donated his eye-watering prize fund to his best friend's cousin, Joanne Harris. At the time, he said: 'I thought my time was up every week. I was more nervous in the nominations than coming out tonight... Joanne needs a heart and lung transplant and they won't put her on the waiting list in England.'
Stand-out moment: Big Brother's inaugural series captivated the nation due to the then-unheard of 'social experiment' style compound. As viewers continued to be enthralled with the season, the behaviour of Nick Bateman was the most shocking. The city broker won the nickname Nasty Nick after he attempted to cheat in the game and pass notes between contestants to sway nominations. He was confronted by eventual winner Craig.
Celebrity Big Brother season two - 2002
Winner: Mark Owen. While CBB was initially conceived as a one off, its huge success meant Channel 4 bought it back as a standalone series to run after the civilian show wrapped. Raising money for charity again, the show was extended to ten days but still featured just six celebrities. Take That singer Mark Owen was announced the winner with 77 per cent of the vote. The star broke down in tears as he left the house, overwhelmed by the public support after retreating from the limelight in recent years.
Stand out moment: After Vanessa and Jack's antics the year before, nothing majorly outrageous took place in series two but the second run of the show is notable for Les Dennis. The TV star entered the house as his marriage to Amanda Holden was breaking down following her much-publicised affair with Neil Morrissey. Viewers saw a broken man on screen, with the star later confessing he had an 'emotional crisis' in the house.BB season five - 2004
Winner: Nadia Almada, from Ribeira Brava, Madeira, Portugal. The star was the only ever transgender winner of Big Brother. She kept her transgender identity a secret from the rest of the house, but viewers were informed. She became a fast favourite and won a huge 74 per cent of the vote. Long-time presenter Davina McCall previously revealed that Nadia was her favourite housemate of all time.
Stand-out moment: The series featured a host of shocking moments, yet none more so than Fight Night. On 17 June, Emma and Michelle Bass re-entered the house after a false eviction landed them in 'The Bedsit', where they watched on as their housemates spoke about them. Upon their return, the house became embroiled in a food fight. As arguments escalated, Nadia slapped Jason Cowan.
After this Emma and Victor both threw trays at each other before they were separated when she screamed: 'I will f**king kill you.'BB season six - 2005
Winner: Anthony Hutton, Newcastle-upon-Tyne. The Geordie dancer and hairdresser walked away with 57.2 per cent of the vote as he beat out Eugene Sully to the prize. Following the show he released a poorly-received workout DVD centered around Seventies dance moves. In 2007 he featured in the TV show Premier League All Stars, representing Newcastle.
Stand-out moment: Kinga Karolczak entered the house late in the series and caused possibly one of the most shocking moments of the entire show. The half-Polish, half-Kuwaiti market researcher from London left viewers aghast when she famously used a wine bottle as a tool for masturbation in the communal garden.
In 2012, she spoke about the incident saying: 'I can't believe the reaction. I was just messing around because I was tipsy, but it never actually touched me. On Big Brother they want you to go crazy so give you loads of alcohol. And drinking makes me behave like a completely different person. So I just put the bottle between my legs, ran into the garden and did it again. I know I didn't even lift up my nightie. I didn't have sex in the pool or in the house, but everyone's labelling me as the slapper.'CBB season four - 2006
Winner: Chantelle Houghton. Series four featured a major twist when ten celebs and one 'civilian' entered the house. Chantelle had auditioned for the sixth non-celebrity series of the show but instead entered the CBB house as part of a secret mission to convince her star housemates she was a member of girlband Kandy Floss. She managed to fool her housemates after they ranked her the ninth most famous housemate in a task on Day four, before going onto win the show. As well as fame, the blonde, who worked as a Paris Hilton lookalike, also got a marriage after she tied the knot with fellow housemate Preston from The Ordinary Boys, but they divorced ten months later.
Stand out moment: George Galloway's inclusion in the show was controversial from the start as he was a sitting MP but it was the bizarre moment when he pretended to be Rula Lenska's pet cat, complete with purring, that was the stand out of the series.
CBB season five - 2007
Winner: Shilpa Shetty. 2007 saw perhaps the most shocking series ever of the show when Jade Goody, who previously appeared on Big Brother, along with model Danielle Lloyd and S Club star Jo O'Meara, was accused of racism following their persistent bullying of Bollywood star Shilpa, who went on to win the show.
Stand out moment: Complaints from viewers soared to 45,000 over behaviour Shilpa Shetty bullying row which sparked a diplomatic incident when the UK and Indian governments got involves. Incidents in the series included Jade Goody referring to the star as Shilpa Poppadom, Lloyd telling Shetty, in foul language, that she should go home to India, and an argument over Shetty cooking a chicken in which offensive comments about Indian cooking were made. The incident led to CBB being cancelled in 2008. While Shilpa went on to win the show, Jade appeared on the Indian version of the show a year later in an attempt to redeem herself. While in the house she was told she had cervical cancer and left the house. Jade died of cancer in March 2009.
BB season seven - 2007
Winner: Brian Belo, from Basildon, Essex, became the youngest ever winner of Big Brother in 2007. He famously claimed he had never heard of playwright William Shakespeare while on the show.
Stand-out moment: Emily Parr, then 19, was ejected from the house in the early hours of the morning for using the N-word. Emily was removed from the house at 3.30am on 7 June 2007 after she was heard to use the racial slur to housemate Charley Uchea while they were chatting in the garden hours before, as she said: 'Are you pushing it out, [N-word]?'
Both Charley and Nicky Maxwell, who was also present, were stunned at her use of the word however she swiftly insisted it 'was a joke'. She was later called to the diary room and told of her ejection by Big Brother.
At the time of Emily's removal, Head of the Big Brother commissioning team at Channel 4, Angela Jain, said after the incident: 'In the wake of Celebrity Big Brother, we must consider the potential offence to viewers regardless of Emily's intentions and her housemates' response.
'The word 'n****r' is clearly racially offensive and there was no justification for its use. We have removed Emily from the house to once again make it clear to all housemates and the viewers at home that such behaviour won't be tolerated.'
CBB season seven - 2010
Winner: Alex Reid. The final series of CBB to air on Channel 4 and with host Davina McCall saw Katie Price's then boyfriend and now ex-husband Alex storm to victory.
Stand out moment: Aside from the fact that the now US President's ex-wife Ivana Trump starred, this series was a less than memorable affair. Not even the inclusion of Katie Price's ex Dane Bowers with Reid in the house livened things up.
CBB season 11 - 2013
Winner: Rylan Clark. After becoming the break out star of X Factor thanks to that snotty-nosed meltdown with Nicole Scherzinger, Rylan entered the CBB house. It would mark the start of his relationship with the reality show as after winning he went on to become host of Bit On The Side, announcing his devastation this week that his Big Brother journey has come to a close.
Stand out moment: The year of Speidi. The Hills villains Spencer Pratt and Heidi Montag were the break out stars of the series especially when they were tasked with spying on their housemates from the spare room, causing all kinds of mayhem. They were so popular they went on to appear on the All Star series.
CBB season 22 - 2018
Winner: Ryan Thomas
Standout moment: Roxanne Pallett called for Ryan Thomas to be removed from the house after she claimed he had 'repeatedly and deliberately punching' her, leading to Ryan getting a formal warning. Within four days, Ofcom received over 25,000 complaints, making this the most complained incident in Big Brother since the race row in 2007.
Roxanne quit the show quit three days later. In an interview with Emma Willis she apologised for her actions, stating she had made a 'horrible mistake' .
When it debuted on Channel 4 in 2000 as a fascinating social experiment, Big Brother took the nation by storm and became a daily fix for viewers around the UK.
And for the first few years of its run it enjoyed an average viewership of between four and five million.
The series peaked in 2002 when it was won by future presenter and DJ Kate Lawler, earning an average of 5.8million viewers per episode.
Series 3's popularity may also have been boosted after it was the first to allow the public to nominate people to be evicted as well as decide who was eventually booted out each week.
The public continued to tune in over the next few years but figures began to drop by 2007, when the show first fell below four million viewers per episode.
The decline continued and more and more viewers left it behind as other reality shows including The X Factor, Strictly Come Dancing and The Only Way is Essex rose in popularity.
By the end of its Channel 4 run the programme was drawing in just three million viewers per episode and the network decided to axe the programme after an 'ultimate' series featuring memorable housemates from both civilian and celebrity editions in September 2010.
Channel 5 then picked it up in 2011 but despite attempts to bring back the buzz, viewership dropped by half for almost the entire series run.
The show hovered around 1.6million viewers per episode for much of its run, peaking at 1.9million per episode in 2013.
The news of its cancellation may help spur the current series, which begins on Channel 5 tonight, back to popularity after the programme hit an all time low in 2017 drawing in just 1.2million viewers per episode.
Meanwhile the Celebrity version also started out strong, earning 5.2million viewers per episode in 2001 in its debut season.
Channel 4 then aired follow ups sporadically, with a three-year gap between series two and three in 2002 and 2005 respectively, but the show was watched by between 4.3million and 4.9million each showing.
But it suffered the same fate as viewers got used to the format, despite attempts to spice it up by bringing in celebrities at different times and ever more daring challenges.
One of the most successful series was in 2006, when non-celebrity Chantelle Houghton had to pretend she was a star and hoodwink the real famous faces, only to become popular enough with the public to win, thanks in part to her romance with Ordinary Boys singer Samuel Preston.
Channel 5 picked up the celebrity version as well and it did far better than its civilian companion initially, peaking at 3.1million viewers per episode in 2013 and 2015.
The broadcaster also doubled up to run two series per year, but this may have oversaturated the market as in recent years the figures have dropped below two million per episode.
THE MAN BEHIND THE CAMERA: HOW TV SUPREMO BROUGHT BIG BROTHER TO OUR SCREENS
Big Brother is the brainchild of television giant Sir Peter Bazalgette, a former BBC and Channel 4 supremo who is now chairman of ITV.
He was hugely influential at the start of the reality television bubble and helped secure Big Brother's birth after importing the format to the UK from its original debut in the Netherlands in 1999.
Sir Peter studied at private school Dulwich College, in south-east London, before going on to Cambridge where he was president of the Cambridge Union Society.
He then went on to join the BBC as a trainee in its new division, before branching out into food and drink features, creating his own production company called Bazal, which was behind hits including Ground Force, Changing Rooms and Ready, Steady, Cook.
Then in 1998 he became creative director of Dutch production company Endemol, which eventually absorbed Bazal.
The firm produced the original Dutch version and has been behind every edition in the UK since Sir Peter agreed a deal with Channel 4 to launch it in the UK in 2000, followed by the celebrity version a year later.
Despite initial positive reviews, Big Brother and Sir Peter were eventually accused of 'dumbing down' television by creating 'ridiculous' challenges such as making George Galloway impersonate a cat, alongside controversies including the racism row in 2007 around Bollywood actress Shilpa Shetty.
It did not harm his standing in the industry however, as he became chairman of the Arts Council in late 2012, and then chairman of ITV in 2016. He also chaired the English National Opera for a year.
His great-great-grandfather, Victorian engineer Sir Joseph Bazalgette, designed London’s sewage system, and the joke goes that while he rid homes of ordure, his great-great-grandson has been pumping it back in again.
Thanks to his string of successful shows including Big Brother, Sir Peter has an estimated wealth of around £15million.
He lives with wife Hilary, a successful lawyer, in Notting Hill and the couple have two children.