Grey's Anatomy's Kate Walsh has joined the cast of the horror/thriller, 1408 for Dimension Films.

The film already stars John Cusack and Samuel L. Jackson is a film adaptation of Stephen King's novel where Cusack will play a debunker of paranormal occurrences who encounters real terror when he checks into the notorious Room 1408 at the Dolphin Hotel, reports Variety. Walsh plays his ex-wife and mother of his young daughter.

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1408 is directed by Mikael Hafstrom, and written by Scott Alexander and Larry Karaszewski. They start shooting this summer in the U.K. for a 2007 release.