- Actor-Shared Background: Damon Vincenti is an Italian-American, just like his actor, Mario Lanza. This is all the more noticeable considering that in the book the film was based on, the protagonist had the more All-American name of John Howard Spring.
- The Cast Showoff: The movie is one big showcase for Mario Lanza's tenor voice.
- Fake Nationality: Spanish Sara Montiel as the Mexican Juana Montes.
- Romance on the Set: Director Anthony Mann married Sara Montiel a year after the movie premiered; they divorced in 1963.
Trivia / Serenade