Crooner Dino is played by Dean Martin, in a role where he essentially is playing himself. Dino is asked at one point in the film what he thinks of the new rock group The Beatles, and he replies in a derogatory manner, with the script imitating Martin's feelings about the band in real life. Dino is then told that they are the new sound and that Dino's sound is obsolete. Ironically, and in reality, soon after the filming of this movie began, Martin recorded his soon-to-be signature song, "Everybody Loves Somebody Sometime," which knocked the Beatles' "A Hard Days' Night" single from the Billboard #1 spot in August 1964, one month after filming wrapped on this movie. Martin therefore became the first easy-listening performer to achieve a #1 Billboard single after the Beatles arrived in America, and did this by usurping the Beatles themselves from the top chart position.
Kiss Me Stupid's theatrical release date and leading actor coincide with a fact of John Wayne's western movie, True Grit (1969). 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, Thursday, December 25th, 1964, was 31 years before Dean Martin lost his life, on Monday, December 25th, 1995.