Television
As an actor, Sleep's credits include Tigger in Winnie the Pooh and Villiers in The Virgin Soldiers. He also appeared as himself in The Goodies episode "Football Crazy". Sleep's choreography credits include David and Goliath.
He was the subject of This Is Your Life in 1981 when he was surprised by Eamonn Andrews following a performance of the musical Cats at the New London Theatre.
Sleep is remembered for having danced with Diana, Princess of Wales at the annual Christmas party of the Friends of Covent Garden at the Royal Opera House in 1985.
In 2003, Sleep appeared in the reality-TV series I'm a Celebrity... Get Me Out of Here!. In the 2005/06 pantomime season, he appeared in Beauty and the Beast at the Theatre Royal, Windsor. Sleep completed a tour of Magic of the Musicals with Marti Webb and Robert Meadmore, as well as appearing as a judge on BBC One's Strictly Dance Fever.
Sleep has worked with the British Shakespeare Company on three occasions, playing Puck in A Midsummer Night's Dream twice (national tour in 2006) as well as Feste in Twelfth Night.
Sleep runs workshops that children of over the age of six can attend. He has appeared as Uncle Willie Tracy in a performance of High Society and appeared as the Emcee in Cabaret.
Sleep also appeared in the 2008 series of Ant & Dec's Saturday Night Takeaway as a team member in the feature "Ant v. Dec". On the first show, Ant's team lost the challenge which meant Ant had to choose one of the team members to be eliminated and chose Sleep.
In January 2011, Sleep featured on British reality cooking show Come Dine with Me, with presenter Terry Christian, Labour MP Diane Abbott and model Danielle Lloyd.
In August 2013, Sleep joined ITV's dance show, Stepping Out as a judge with Melanie Brown and Jason Gardiner. The show aired for one series.
On 5 January 2014, Sleep and his family went on the game show All Star Family Fortunes, playing against Girls Aloud member Kimberley Walsh.
In February 2014, Sleep appeared in the Channel 4 show Big Ballet about overweight ballet dancers. He finished fourth in the 2014 series of the BBC One cookery contest Celebrity MasterChef.
In 2015, he appeared in a celebrity edition of The Chase, a game show where he competed for charity.
Sleep also appeared in the BBC miniseries that followed a group of celebrity pensioners on a journey to India, The Real Marigold Hotel, broadcast from January to February in 2016. He appeared in subsequent episodes travelling to Florida and Japan in December 2016 and then China and Cuba in December 2017.
In 2017 he appeared in The Real Full Monty, celebrating the film The Full Monty's 20th anniversary and raising awareness for prostate and testicular cancer. He also appeared in the BBC's Queer as Art documentary celebrating the LGBTQ contribution to British arts in the 50 years since decriminalisation.
In January 2018 Sleep entered the British version of Celebrity Big Brother, making the final and finishing in fifth place.