Rosalie is a 1937 American musical film directed by W.S. Van Dyke and starring Eleanor Powell, Nelson Eddy and Frank Morgan. An adaptation of the 1928 stage musical of the same name, the film was released in December 1937. The film follows the story of the musical, but replaces most of the Broadway score with new songs by Cole Porter. The story involves the romantic entanglements of a princess in disguise and a West Point cadet.

Woodbridge Strong Van Dyke II was an American film director who made several successful early sound films, including Tarzan the Ape Man in 1932, The Thin Man in 1934, San Francisco in 1936, and six popular musicals with Nelson Eddy and Jeanette MacDonald. He received two Academy Award nominations for Best Director for The Thin Man and San Francisco, and directed four actors to Oscar nominations: William Powell, Spencer Tracy, Norma Shearer, and Robert Morley. Known as a reliable craftsman who made his films on schedule and under budget, he earned the name "One Take Woody" for his quick and efficient style of filming.