Peter Capaldi at the 2013 BAFTA's held at the Royal Festival Hall, London.
Capaldi is a "life-long Doctor Who fan" and his appointment as The Doctor has fulfilled his life's ambition. The 55-year-old actor has appeared in Doctor Who before in the episode 'The Fires of Pompeii' in season 4 of the revitalised science fiction series.
Capaldi will be the twelfth actor to play Doctor Who since its first broadcast in 1963. Having obtained the role, Capaldi was sworn to secrecy and said, when revealed as The Doctor, that it was "so wonderful not to have to keep the secret any longer."
The announcement was made on a special broadcast Doctor Who Live: The Next Doctor on Sunday (4th August). Airing at 7pm on BBC1 in the UK and 2.30pm on BBC America, the show was hosted by Zoe Ball and featured numerous celebrity fans of the show.
The current Doctor, Matt Smith, gave an exclusive interview for the show. He will be handing over the role to Capaldi at the Doctor Who Christmas special. He sent his successor his best wishes and good luck. Smith described Capaldi as a "huge fan of the show" and "a really nice guy." He went on to say that the actor is "going to have a blast" and "it's going to be a thrill".
Writer Steven Moffat paid tribute to Matt Smith describing him as a brilliant actor. He also commented on the pressures of selecting the next Doctor as fans are so invested in the show.
Doctor Who will celebrate its 50th anniversary on 23rd November when a special anniversary episode will be broadcast.
Steven Moffat at the Edinburgh International Television Festival.