Mr Davies, the star of Jonathan Creek and a regular panellist on QI, and Ms Coren Mitchell, a professional poker player and Only Connect host, will join three other comedy names on series 12 of the Channel 4 programme.
A 40-second trailer was released revealing the famous faces which are set to grace our screens including writer and actor Desiree Burch, Man Like Mobeen comedian Guz Khan and Bafta-winning impressionist and actor Morgana Robinson
The programme sees the five contestants at the mercy of host and Taskmaster Greg Davies, who sets them a range of strange challenges which often require thinking outside the box.
Davies then delivers his “merciless” verdict before handing out points based on their efforts.
Originally conceived by scorekeeper Alex Horne at the Edinburgh Festival Fringe in 2010, Taskmaster transferred to Dave in 2015, then moved to Channel 4 for a six-series run from October 2020.
95 episodes have aired in the UK so far, with a further 40 still to come as part of the six-season deal confirmed with Channel 4 last year.
The show won the TV Bafta for comedy entertainment programme in 2020.
Previous contestants have included Lee Mack, Daisy May Cooper, David Baddiel, James Acaster, Russell Howard and Alice Levine.
The news was announced as the winner of series 11 was revealed on Channel 4. The 12th series will air later in 2021.