The reason Esther Williams is given credit as a co-writer is because the project was originally intended as a swimming vehicle for her. However the swimming scenes were changed to singing ones and Williams was replaced with Jane Powell by producer Dore Schary. This was one of the reasons why Williams would soon leave MGM.
The song "Faster Than Sound" by Hugh Martin and Ralph Blane was recorded but not used in the final print.
When the daughter of Italian director Pietro Francisci saw this film, she suggested bodybuilder-turned-actor 'Steve Reeves' for the title role in her father's upcoming production Le fatiche di Ercole (US title: "Hercules").