Final theatrical movie of William Holden (Tim Culley). Shortly after completing this movie, according to the coroners report, apparently tripped on a throw rug in his bedroom and fell, cutting his head open on the edge of an nightstand, striking it so hard the corner created a hole in the wall. Though there was a working telephone within reach, the number of blood soaked tissues found suggest he didn't understand the severity of his injury due to his high alcohol blood content and didn't call for help. He subsequently bled to death. His body wasn't discovered for several days.
For the scene where Dame Julie Andrews bares her breasts, Johnny Carson on The Tonight Show Starring Johnny Carson (1962) thanked her for "showing us that the hills were still alive," referencing her famous song lyric from La Mélodie du bonheur (1965).
When Blake Edwards had his name removed from the writing credits of Haut les flingues! (1984), he got himself billed under the pseudonym of "Sam O. Brown," whose initials are S.O.B.
Robert Vaughn revealed on the "Ron & Fez" XM Satellite radio program that his character was based upon legendary movie producer Robert Evans.
This movie was based loosely on writer, producer, and director Blake Edwards' experiences making Darling Lili (1970) and Deux Hommes dans l'Ouest (1971).