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.

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.

1408 was released June 22nd, 2007 and stars John Cusack, Samuel L. Jackson, Mary McCormack, Tony Shalhoub, Len Cariou, Isiah Whitlock Jr., Jasmine Jessica Anthony, Paul Birchard. The film is directed by Mikael Håfström.