Julianne Moore is tossing her pointy hat into the ring of actors gathering around director Sergei Bodrov’s Seventh Son. The still sexy 50-year-old actress will play Mother Malkin, an evil witch made powerful through her use of blood magic.

The film’s plot crunch reads:

Tom Ward, a young boy training to be an exorcist in the 1700’s, must learn how to exorcise ghosts, contain witches, and bind boggarts. Trouble begins when he’s tricked into releasing the most evil witch in the world.

The Seventh Son is based on young-adult novelist Joseph Delaney’s “The Wardstone Chronicles,” the first volume in his book series “The Last Apprentice.” Moore is the second actor to be cast in the project. She joins Oscar winner Jeff Bridges, who will be playing exorcist Master Gregory (AKA: The Spook).

Horror fans will also get to see Moore in the Weinstein’s upcoming supernatural thriller Shelter and Killer Film’s vampire frightener Innocence. Her previous genre creds include the cougar/cub lesbian thriller Chloe and the dystopian dramas Blindness and Children of Men.