Career: Walsh's big TV break came in 1993, when he appeared on the Royal Variety Show. It led to a stint presenting the National Lottery, and he also hosted the game shows Wheel of Fortune and Win, Lose or Draw. After fearing his brand of light entertainment was becoming dated he moved into acting, taking parts in the TV version of Lock, Stock, the soap Night and Day and movie Mike Bassett: England Manager before Coronation Street's bosses created the role of Danny Baldwin for him in 2004. He stayed in Weatherfield for two years before leaving to pursue other projects. He's since appeared in Torn, The Old Curiosity Shop, The Sarah Jane Adventures, Law and Order: UK and SunTrap. He moved back into presenting in 2009 with ITV quiz show The Chase, and is a team captain on Play to the Whistle.

Career: In 1987, Ross and his friend Alan Marke devised a format inspired by Late Night with David Letterman, and after struggling to find a suitable host, Ross stepped in. The resulting show, The Last Resort with Jonathan Ross, made him a star. Other major projects include his chat shows Friday Night with Jonathan Ross and The Jonathan Ross Show, and his stint as the reviewer of the BBC's Film programme. He's also a massive comic book fan; his first foray into the genre, Turf, was published in 2010. But he's also hit the headlines for various controversies over the years, including the notorious Sachsgate, which involved a prank call made by him and Russell Brand to actor Andrew Sachs in 2008.

Career: Mangan became a regular on the West End stage, and apart from some foreign adverts, steered clear of TV work for years. He made his film debut in Martha, Meet Frank, Daniel and Laurence in 1998, and had a small role in Billy Elliot. Early TV appearances came in Big Bad World, Sword of Honour, In Defence and Human Remains before his big break as the lead in Adrian Mole: The Cappuccino Years. He's worked consistently in movies and on TV ever since, with roles in Jane Hall, Marple, Never Better, I'm Alan Partridge, Hyperdrive, and the acclaimed Green Wing. His recent work includes Dirk Gently and Episodes on TV, as well as several well-received stage performances.

Career: In 2002, Walsh landed her big break on talent show Popstars The Rivals when she was selected to appear in the line-up for new girl group Girls Aloud, alongside Nadine Coyle, Sarah Harding, Nicola Roberts and Cheryl Cole. The group topped the charts with their debut single, Sound of the Underground, and they have had continued success with singles, albums and tours. After a three-year break, the girls reunited in 2012 to perform the official charity single for Children in Need. Away from performing with Girls Aloud, Walsh made her West End debut playing Princess Fiona in Shrek the Musical, and partnered with professional dancer Pasha Kovalev on Strictly Come Dancing.

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.