Million Dollar Mermaid (also known as The One Piece Bathing Suit in the UK) is a 1952 American biographical drama film about the life of Australian swimming star Annette Kellerman. It was directed by Mervyn LeRoy and produced by Arthur Hornblow Jr. from a screenplay by Everett Freeman. The music score was by Adolph Deutsch, the cinematography by George Folsey and the choreography by Busby Berkeley.

George Folsey received a 1953 Oscar nomination for Best Cinematography, Color.

The film stars Esther Williams, Victor Mature, and Walter Pidgeon, with David Brian and Donna Corcoran.