Heart of the Rio Grande is a 1942 American Western film directed by William Morgan and starring Gene Autry, Smiley Burnette, Fay McKenzie, and Edith Fellows. Based on a story by Newlin B. Wildes, the film is about a singing cowboy and dude ranch foreman who helps a spoiled teenager and her business tycoon father discover what is most important in life. The film features the songs "Let Me Ride Down in Rocky Canyon", "Deep in the Heart of Texas", "Dusk on the Painted Desert", and "Rainbow In the Night" performed by Edith Fellows.