"Show Boat," directed by George Sidney, was released in 1951 and centers on the riverboat, which travels the Mississippi with a cast of performers on board. Passengers include Magnolia Hawks (Kathryn Grayson), the daughter of the ship's captain; her paramour Gaylord Ravenal (Howard Keel), a gambler; and Julie LaVerne (Ava Gardner), the boat's star performer who is discovered to have African-American ancestry.