Lee Mack, Katherine Ryan and Harry Hill lead cast of Last One Laughing series 3

Rounding out the contestants are Josh Jones and Roisin Conaty.Conaty was previously host Jimmy Carr’s deputy in the control room.Katherine Ryan has joined the show for series three (Lucy North/PA)PA WireSeries two contestant Mel Giedroyc will join Carr in the control room.In the show a group of comics spend a day together while trying not to laugh.If they laugh, they are out of the game. The last contestant remaining receives a trophy.If more than one comedian is still left by the end of the game, the winner is decided by who caused the most laughs.Jimmy Carr has returned as host (Ian West/PA)PA ArchivePrime Video has also said there will be a Halloween special in October.Jack Dee, Tom Allen, Harriet Dyer, Reece Shearsmith and Phil Wang will take part alongside returning series one stars Daisy May Cooper and Lou Sanders.Series one was won by Bob Mortimer, and David Mitchell won series two.The Halloween special will premiere on October 23, and series three will premiere in 2027.