What was the first movie to win in all five major Academy Awards categories?

It Happened One Night was the first movie to win all five major Academy Awards (Best Picture, Director, Actor, Actress, and Screenplay), a feat that would not be matched until One Flew Over the Cuckoo's Nest (1975) and later by The Silence of the Lambs (1991). In 1993, It Happened One Night was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant". In 2013, the film underwent an extensive restoration.

To note some details, It Happened One Night is a 1934 American romantic comedy film with elements of screwball comedy directed and co-produced by Frank Capra, in collaboration with Harry Cohn. In the movie, there is a pampered socialite (Claudette Colbert) who tries to get out from under her father's thumb and falls in love with a roguish reporter (Clark Gable). The plot is specifically based on the August 1933 short story, Night Bus, by Samuel Hopkins Adams.