Season 21 will star Amy Gledhill, The Thick of It’s Armando Iannucci, Gavin and Stacey actor Joanna Page, presenter Joel Dommett and the one-and-only Hollywood star Kumail Nanjiani. ‘He surprised himself by what he revealed, and I was sat next to him, and it’s a big moment. It’s a never-before-seen Taskmaster moment.’The star-studded cast is getting ready to deliver (Picture: Channel 4)The Hollywood star was ready to do Taskmaster come hell or high water (Picture: Getty)Curious indeed. Kumail is following in the footsteps of season 20 contestant Jason Mantzoukas in the continuing trend of US-based comics trying their hand at this truly bonkers UK reality series. There is currently no release date for Taskmaster season 21.