Oklahoma! is a 1955 American musical film based on the 1943 musical of the same name by Richard Rodgers and Oscar Hammerstein II, which in turn was based on the 1931 play Green Grow The Lilacs written by Lynn Riggs. It stars Gordon MacRae, Shirley Jones, Rod Steiger, Charlotte Greenwood, Gloria Grahame, Gene Nelson, James Whitmore, and Eddie Albert. The production was the only musical directed by Fred Zinnemann. Oklahoma! was the first feature film photographed in the Todd-AO 70 mm widescreen process.

Musical film is a film genre in which songs by the characters are interwoven into the narrative, sometimes accompanied by dancing. The songs usually advance the plot or develop the film's characters, but in some cases, they serve merely as breaks in the storyline, often as elaborate "production numbers".