Michael Sheen

Michael Sheen played a werewolf in the Underworld trilogy, and now he's switching sides.

The acclaimed Welsh actor has joined the Twilight sequel New Moon, Variety reports. Sheen will play Aro, the leader of Volturi, a powerful coven of vampires.

New Moon is currently in production in Vancouver and is slated for a November release.

Sheen was most recently seen in the Oscar-nominated Frost/Nixon as British journalist David Frost.