Michael Sheen, who has featured in three cinema releases over the past three months – Frost/Nixon, Underworld: Rise of the Lycansand The Damned United– has joined Robert Pattinson and Kristen Stewart in the Twilight sequel, New Moon, which is due for release in November. Sheen, who played a werewolf in the Underworld movies, is cast as the leader of the Volturi, an Italian- based coven of vampires.