The Fresh Meat star, who is a regular guest on James Corden's panel quiz show, donned a belly top to take part in a fast-walking race against Olympian Jo Jackson - on a treadmill.
© Sky
© Sky
© Sky
Whitehall recently told Digital Spy that he had been looking for an acting role for a "long time", and said his part in the Channel 4 show was different to his "quite flamboyant and camp" behaviour on stage.
Find out how the comedian fares during the task, as the new series continues tonight at 10pm on Sky1.
> Jack Whitehall, Micky Flanagan, Alan Carr to play 'Live at the Apollo'
