Elvis Presley actually drove the beach buggy for most of the high-speed opening scene.
Albert, the Great Dane in the movie was played by Elvis Presley's own dog Brutus.
Filming ended May 1, 1968. The same day Elvis Presley celebrated his and Priscilla Presley's first wedding anniversary.
Last film of director Norman Taurog.
The film's working title was "Kiss My Firm, But Pliant Lips" (the title of the novel by Dan Greenburg upon which it was based).