Career: Carr began performing on the stand-up circuit, doing up to 300 shows a year for three years, before taking his act to the Edinburgh festival in 2002. This brought him to the attention of TV bosses, and before long he was presenting series such as Your Face or Mine and Distraction. Since then, he's rarely been off TVscreens, hosting the first run of the Friday Night Project, 8 Out of 10 Cats and numerous Channel 4 list shows. He's also made a move into acting, appearing in Alien Autopsy, Confetti, Stormbreaker and Telstar. He is one of Britain's busiest comics and his DVDs are big sellers.

Career: Riley's big break came in 2008 when she was chosen from more than 1,000 applicants to replace Carol Vorderman on Countdown. She presented her first show alongside Jeff Stelling in January 2009, and reached her 1,000th episode in June 2013. Away from the numbers and letters on Countdown, she began co-hosting The Gadget Show alongside Jason Bradbury in June 2013. She was a contestant on Strictly Come Dancing in 2013 and was the fifth celebrity to be eliminated.

Career: While still presenting, Brydon ventured into comedy, and made ends meet by providing voices for adverts and animations. A small role in Lock, Stock and Two Smoking Barrels inspired him to make a short film of his comic characters; series of Marion & Geoff, A Small Summer Party and The Keith Barret Show followed. Other credits include Director's Commentary, Human Remains, Supernova, A Cock and Bull Story, Little Britain, Annually Retentive and Gavin & Stacey. He's also hosted his own BBC chat show and has chaired the comedy panel show Would I Lie to You? since 2009. In 2010, he starred alongside Steve Coogan in the partially improvised BBC Two sitcom The Trip and has since appeared in its follow-up.

Career: While originally intending to pursue a career as a serious actress, her comic abilities saw her quickly noticed by talent scouts. She landed a role in ITV's Doc Marten before The IT Crowd came along. Other recent roles include hit movie The Boat That Rocked and sitcom The Old Guys. She also has several theatre credits.

Career: In 2003, Richardson won his heat of the BBC New Talent Comedy Search, and a year later did well in the Laughing Horse New Act of the Year competition and J20 Last Laugh Comedy Search. Encouraged by these successes and kind words from Jasper Carrott and Dave Spikey for a performance at the Criterion Theatre in London, his confidence grew. More stand-up followed, including appearances at the Edinburgh Fringe Festival. He went on to feature on numerous radio shows before moving into TV. Richardson appeared on Never Mind the Buzzcocks and Have I Got News For You before becoming a team captain on 8 Out of 10 Cats. He's since published his first book, It's Not Me, It's You! and taken part in various documentaries.

Career: In 1995, Buxton and Cornish submitted a video sketch for a comedy show on Channel 4 called Takeover TV. This led to them being hired to do continuity links and a year later, they were given their own show on Channel 4 called The Adam and Joe Show. This ran for four series between 1996 and 2001 and it took the form of short sketches interspersed with links filmed from a bedsit. Buxton's father, Nigel, appeared in a weekly sketch as the character BaaadDad. Buxton and Cornish went on to present radio shows on Xfm and BBC Radio 6 Music. Buxton boosted his acting CV with roles in Randall and Hopkirk (Deceased), Swiss Toni, The IT Crowd, Hot Fuzz (2007), Son of Rambow (2007), Stardust (2007), The Persuasionists and Country Man. Since 2007, he has hosted the BFI's music video showcase Bug. A TV version, Adam Buxton's Bug, was shown on Sky Atlantic in 2012. Buxton guest starred in several episodes of 8 Out of 10 Cats Does Countdown in 2014 and 2015. He has produced The Adam Buxton Podcast since September 2015.