Psycho is a 1960 American horror film produced and directed by Alfred Hitchcock. The screenplay, written by Joseph Stefano, was based on the 1959 novel of the same name by Robert Bloch. The film stars Anthony Perkins, Janet Leigh, Vera Miles, John Gavin and Martin Balsam. The plot centers on an encounter between on-the-run embezzler Marion Crane (Leigh), shy motel proprietor Norman Bates (Perkins) and his disturbed mother. A private investigator (Balsam), Marion's lover Sam Loomis (Gavin) and her sister Lila (Miles) investigate her disappearance.
Psycho was seen as a departure from Hitchcock's previous film, North by Northwest (1959), as it was filmed on a small budget in black-and-white by the crew of his television series Alfred Hitchcock Presents.