One Flew Over the Cuckoo's Nest is a 1975 American drama film directed by Miloš Forman and starring Jack Nicholson as Randle McMurphy, a criminal who is sentenced to a mental institution. The film is based on the 1962 novel of the same name by Ken Kesey.
The film received widespread critical acclaim and was a commercial success, grossing over $108 million at the box office. It won five Academy Awards, including Best Actor for Nicholson and Best Actress for Louise Fletcher, who played Nurse Ratched, the film's antagonist.
One Flew Over the Cuckoo's Nest is considered a classic of American cinema and is widely regarded as one of the greatest films ever made. Its portrayal of mental illness and the institutions that treat it remains powerful and resonant today.