Davina McCall (born 16 October 1967) provided the voice of the Davinadroid in Bad Wolf. She is most famous for hosting Big Brother. In March 2009 she co-hosted the BBC's Red Nose Day appeal for Comic Relief alongside David Tennant, during which she had the ignomy of being beaten by Tennant in a mock game of Mastermind in which he demonstrated superior knowledge of Doctor Who versus her knowledge of Big Brother.