The 12th Doctor will be
Peter Capaldi http://www.bbc.co.uk/news/entertainment-arts-23570354 He was in Torchwood: Children of Earth and played Caecilius in 'The Fires of Pompeii', the episode of Doctor Who in which Karen Gillan first appeared before becoming Amy Pond. I remember him best as the angel Islington in Neverwhere, a role he played very well indeed.
