Evidently he's well known in the UK because of TV work. The audience at the live announcement on BBC America stood up and cheered when he walked on to the stage. (Did anyone else watch that besides Austin?) Capaldi is 55, the same age as William Hartnell when he played the first Doctor. Capaldi has played some small roles in movies, like a World Health Organization doctor (a WHO doctor, ha!) in World War Z. He looks kind of familiar to me, but I can't say from where. Did you know Doctor Who has been around for half a century? Started in 1963.