Ursula Andress was cast only after Ann-Margret was forced to withdraw due to too many commitments with other studios.

According to Simon Doonan, all the costumes for this film were by André Courrèges.

Andress and Mastroianni dated during production and briefly rekindled the fling in 1975 while Ursula was on a break from Fabio Testi. By the time she and Mastroianni made Double Murder (1977), their second movie together, they were just friends.

Sue Lyon was briefly in the running for female lead after Ann-Margret passed but before Ursula Andress was cast.

Kim Novak auditioned for the female lead.