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.

Oklahoma! is the first musical written by the duo of Rodgers and Hammerstein. The musical is based on Lynn Riggs's 1931 play, Green Grow the Lilacs. Set in farm country outside the town of Claremore, Indian Territory, in 1906, it tells the story of farm girl Laurey Williams and her courtship by two rival suitors, cowboy Curly McLain and the sinister and frightening farmhand Jud Fry. A secondary romance concerns cowboy Will Parker and his flirtatious fiancée, Ado Annie.