Earlier today, British actor, comedian and writer David Walliams announced on The Chris Evans Breakfast Show on BBC Radio 2 that he is to star in an upcoming Doctor Who story. No details are known other than he is playing an "alien" and filming begins "soon". Hear the interview in the player below.
Walliams is no stranger to the show having appeared in the sketches, The Web of Caves, The Kidnappers and The Pitch of Fear as part of a BBC 2 theme night (which also featured Mark Gatiss and Peter Davison) as well as contributing his voice talents to the Big Finish series. He recently appeared with Matt Smith on The Graham Norton Show, see it HERE.
UPDATE [19/2] From the BBC:
He'll feature in a spooky episode playing a character called Gibbis. Walliams said, "I am a huge fan of Doctor Who and am so looking forward to working with Matt Smith and running up and down some corridors with him." His episode has been written by Toby Whithouse, whose previous contributions include Vampires of Venice and School Reunion.