Under Fiesta Stars is a 1941 American Western film directed by Frank McDonald and starring Gene Autry, Smiley Burnette, and Carol Hughes. Based on a story by Karl Brown, the film is about a singing cowboy and rodeo champion who inherits a ranch and mining property along with his foster father's niece. She wants to sell but needs his consent, and he wants to work the mine according to his foster father's wishes. Problems arise when the niece unwittingly gets involved with unscrupulous lawyers who are plotting to steal the mine. The film features the songs "Purple Sage in the Twilight", "When You're Smiling", and the title song.