Cartoonist from Mad Magazine and of several TV Guide covers Jack Davis did the illustration for the poster which can also be seen in the closing credits during the theme song.
Instead of a card reading The End the film ends with "It's Over" displayed on-screen.
The title song played over the end credits concludes with Sammy singing: "Next time I'm gonna get the girl, that's definite," a Bond-like hint of a sequel, which did occur with One More Time.