My Gal Sal is a 1942 American musical film distributed by 20th Century Fox and starring Rita Hayworth and Victor Mature. The film is a biopic of 1890s German-American composer / songwriter Paul Dresser and singer Sally Elliot. It was based on a biographical essay, sometimes erroneously referred to as a book, by Dresser's younger brother, novelist Theodore Dreiser (Dreiser was the original German family name). Some of the songs portrayed as Dresser's work were actually written by him, but several others were created in the 1890s style for the film by the Hollywood songwriting team of Ralph Rainger and Leo Robin.

Sally Elliott, a musical star meets up with Indiana boy Paul Dresser, a runaway who after a brief stopover with a medicine show arrives in the Gay Nineties era of New York City. He composes the title tune for the fair lady and becomes the toast of Tin Pan Alley.