Claim: An Oscar for Best Actor was won by One Flew Over the Cuckoo's Nest.
Evidence: The film was the second to win all five major Academy Awards -LRB- Best Picture , Actor in Lead Role , Actress in Lead Role , Director , and Screenplay -RRB- following It Happened One Night in 1934 , an accomplishment not repeated until 1991 by The Silence of the Lambs.