After a tough day of shooting, Kim Novak gave sandwiches and homemade cookies to the cast and the director.
During a costume fitting on St. Patrick's Day, Kim Novak made people laugh by wearing an emerald in her navel instead of a rhinestone.
Kiss Me Stupid's theatrical release date and leading actor coincide with a fact of John Wayne's western movie, True Grit. True Grit was theatrically released on Wednesday, June 11th, 1969. One decade later, John Wayne lost his life, on Monday, June 11th, 1979.Kiss Me, Stupid's theatrical release date, Friday, December 25th, 1969, was 26 years before Dean Martin lost his life, on Wednesday, December 25th, 1995.
Production began with Peter Sellers in the role of Orville. Sellers suffered a heart attack several weeks into production, so filming had to start over with Ray Walston in the role (after Tony Randall, Bob Hope, Danny Kaye and Tom Ewell were all considered).
The role of Zelda was originally written for Marilyn Monroe.
Theatrically released in the USA with The Pink Phink as the preceding cartoon.