Career: Armstrong made his film and TV debuts in 1994 in There's No Business and A Breed of Heroes. He was introduced to Ben Miller in 1996 and their subsequent success at the Edinburgh Festival Fringe led to their first sketch series in 1997; they've worked together a number of times since on various projects. Armstrong played the lead in short-lived sitcom Beast. He has also appeared in Birthday Girl (2001), I Saw You, TLC, Saxondale, Life Begins, The Trial of Tony Blair, Mutual Friends, Woody Allen's Match Point (2005) and Scoop (2006). Armstrong was the voice of supercomputer Mr Smith in The Sarah Jane Adventures, appeared in the 2011 Doctor Who Christmas Special and has presented the BBC game show Pointless since 2009. In recent years, he has also voiced Danger Mouse in the revival of the animated series and presented Rome's Invisible City, Land of the Midnight Sun and Don't Ask Me Ask Britain.

Career: Osman has worked behind the scenes as an executive producer on a number of TV programmes, including Deal or No Deal, 8 Out of 10 Cats, and 10 O'Clock Live. As the UK creative director of TV production company Endemol, he pitched the quiz Pointless to the BBC. As a way of explaining the rules, he played the co-host during a run-through. He was asked to do the role for real when the show was commissioned. Pointless started on BBC Two in 2009 and was an immediate hit. It quickly made the switch to BBC One. Since being in the spotlight on Pointless, he has made guest appearances on QI, Have I Got News for You and Would I Lie to You? He also guest presented an episode of The One Show alongside Alex Jones.

Career: Vaughan caught the eye of Yorkshire coach Doug Padgett while playing for his school team. However, he had to wait for Yorkshire to alter their rules about only signing home-grown players before he could join the county. He went on to captain the England under-19 team, and made his full Test debut against South Africa in 1999. He became captain after Nasser Hussein quit in 2003. The team was hugely successful, winning the Ashes in 2005, but following a series defeat against South Africa in 2008, he resigned during an emotional press conference. Vaughan retired from first class cricket a year later. He is now a respected commentator. In 2012, he partnered professional dancer Natalie Lowe on Strictly Come Dancing.

Career: A slow left-arm orthodox spin bowler, 'Tuffers' as he was known played 42 Tests and 20 One Day International matches for England, as well as playing for Middlesex from 1986 to 2002. He took 121 Test wickets as an England bowler, but it is his good-humour and occasionally outrageous behaviour that made him a popular sports personality. Following his retirement in 2002, Tufnell has built on his popularity with several TV appearances. These include I'm a Celebrity...Get Me Out of Here! which he won, They Think It's All Over, A Question of Sport, The One Show and Strictly Come Dancing. In early 2015, he was a contestant on Channel 4 reality series The Jump.