<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Big Brother is the British version of the international reality television franchise Big Brother created by producer John de Mol in 1997 . The show follows a number of contestants, known as housemates, who are isolated from the outside world for an extended period of time in a custom built house . Each week, one of the housemates is evicted by a public vote, with the last housemate remaining winning a cash prize . The series takes its name from the character in George Orwell's 1949 novel Nineteen Eighty - Four . The series premiered on 18 July 2000 on Channel 4, and immediately became a ratings hit . The series also featured a 24 - hour live feed, in which fans could view inside the house at any time . Big Brother aired for eleven series on Channel 4, followed by one final special edition, Ultimate Big Brother, which ended on 10 September 2010 . Following this, Channel 5 acquired the rights to the series, and it was officially relaunched on 18 August 2011 . In 2014, Emma Willis announced that the show would be back for a sixteenth series in 2015 . It was announced on 19 March 2015 that the show would remain on air until at least 2018 . </P> <P> The show was initially hosted by Davina McCall from its inception to its cancellation by Channel 4 . Despite being offered the position of host following the show's move to Channel 5, McCall chose not to return . Former winner Brian Dowling became the host, a position he held throughout the twelfth and thirteenth series . Emma Willis later replaced Dowling as the host of the series from the fourteenth series onwards . Marcus Bentley has been the narrator of the series since it premiered in 2000 . Big Brother has had numerous spin - off series occur since its premiere, most notably Celebrity Big Brother, which is a shorter version of the main series whereas the cast is composed solely of celebrities . Numerous other spin - off series that are not competition based have aired, with Dermot O'Leary, Russell Brand, George Lamb, and Emma Willis all hosting spin - offs . Over the course of its run, there have been a total of 42 series of Big Brother: eighteen regular series, twenty celebrity series and four special series . Currently, it is the third longest running version of Big Brother to date, following the Spanish and American adaptations . </P>

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