"One Flew Over the Cuckoo's Nest" is a dramatic film released in 1975, based on the novel of the same name by Ken Kesey. Directed by Miloš Forman, the movie stars Jack Nicholson in the lead role of Randle McMurphy.

The story takes place in a mental institution and follows the charismatic and rebellious McMurphy as he feigns insanity to serve his prison sentence in a more relaxed environment. McMurphy clashes with the authoritarian Nurse Ratched (Louise Fletcher), who maintains strict control over the patients. McMurphy's arrival disrupts the oppressive routine, inspiring the other patients to assert their individuality.

"One Flew Over the Cuckoo's Nest" explores themes of freedom, conformity, and the power dynamics between those in authority and those they govern. The film delves into the human spirit, mental health, and the importance of personal autonomy.

The movie received widespread acclaim and was a critical and commercial success. It became one of the rare films to win the "Big Five" Academy Awards: Best Picture, Best Director, Best Actor, Best Actress, and Best Adapted Screenplay.

"One Flew Over the Cuckoo's Nest" is considered a landmark film in American cinema, known for its powerful performances, thought-provoking narrative, and examination of institutional control and rebellion.