Career: Hailed as the best new stand-up to emerge in a decade, Michael has taken the comedy world by storm. He delivered electrifying sets on both We Are Not Amused (Prince Charles's 60th birthday celebrations on ITV1) and the Royal Variety Performance (BBC One), plus a stand-out performance as host on the first episode of BBC One's Live at the Apollo, leading to the Comedy Roadshow vehicle.

Career: Horwood's West End credits include roles in Cats, Miss Saigon and Crazy for You. As a choreographer, he has worked on West Side Story, Martin Guerre and Spend Spend Spend, and as a director on Sunset Boulevard, Chess, the live tour of Strictly Come Dancing, and the opening ceremony of the 2002 Commonwealth Games in Manchester. He became a household name in 2004 after becoming a member of the judging panel on Strictly Come Dancing. He has a reputation for awarding the lowest marks of all the judges. Since 2009, he has been a regular on the pantomime circuit and in 2011 became a British citizen.

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: O'Leary got his big break as a DJ on BBC Radio Essex. He gave that up to be a TV runner working on the series Century Road, about a street in Walthamstow. He later landed a presenting slot on Sunday show Fully Booked. Following a move to Channel 4, he hosted T4 before fronting Big Brother's Little Brother in 2001. He has his own production company called Murphia and has helped to launch Cafod's youth-fundraising scheme, Fast Track. His other TV credits include SAS: Are You Tough Enough?, UK Music Hall of Fame, Shattered and the National Lottery quiz 1 vs 100. He also presents his own show on Radio 2 and, of course, ITV's The X Factor.