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British thesp Michael Sheen has joined the "Twilight" brigade.

Summit Entertainment has added Sheen to the cast of "The Twilight Saga: New Moon," which began shooting last month in Vancouver.

Sheen, known for his roles in "Frost/Nixon" and "The Queen," will portray the leader of the Volturi, an Italy-based coven of vampires, in the "Twilight" sequel.

Sheen has played a werewolf in all three "Underworld" films.

"New Moon" stars Kristen Stewart and Robert Pattinson reprise their "Twilight" roles as Bella and Edward, with Chris Weitz directing.

The pic, which centers on Bella being drawn into the world of werewolves while threatened by the Volturi, will be released domestically on Nov. 20.

"Twilight," which was a B.O. sensation in its November bow, has grossed $380 million worldwide.