The Circle, sometimes called The Circle UK, is a British reality television game show and the original version of The Circle franchise. Produced by Studio Lambert and Motion Content Group and airing on Channel 4, the show bills itself as a game based around social media, with the concept that "anyone can be anyone in The Circle". Throughout the show, contestants live in the same apartment building but are never allowed to meet. The show is narrated by Sophie Willan, whilst the first and last episode of the first series were hosted by Maya Jama and Alice Levine (later replaced by Emma Willis from the second series onwards). The show has been compared to Big Brother and Catfish in format, as well as Black Mirror episode "Nosedive" with the concept of having to rate other people.

The first series was won by 26-year-old Internet comedian Alex Hobern, who had played the game claiming to be a 25-year-old woman called Kate, using photos of his real-life girlfriend Millie. Hobern also won the "viewers champion" for an additional £25,000, claiming £75,000 in total. The second series was won by Paddy Smyth, with Tim Wilson winning the "viewers champion" vote. In June 2020, The Circle was renewed for a third series. The Celebrity Circle was also announced. The Circle was cancelled in May 2021. However, Studio Lambert are reportedly in talks with Netflix to launch the British version of the show on the streaming service.