Ella Fitzgerald's piano playing was ghosted by Cliff Smalls. Fitzgerald also recorded the songs "I'm Getting Sentimental Over You", "Misty", and "Who's Sorry Now", but they weren't used in the film. Fitzgerald's album of music from the film was unavailable for years but has since been issued on CD under the title "The Intimate Ella".
A poster for A Noite do Demônio (1957) appears on a wall near the end of the film; the film also was a Columbia release.
Jean Seberg still wears the pixie haircut that she had given herself in 1957 for her starring role in "Saint Joan."