Trivia

The film was originally to have been directed by Orson Welles, Luis Buñuel and Federico Fellini.

Peter O'Toole was originally cast as Toby Dammit. After he pulled out, Federico Fellini contacted a London casting agency and asked them to send the most decadent actors they had to Rome to see him. They sent Terence Stamp and James Fox, and Fellini chose Stamp.

While filming the "Metzengerstein" segment with his sister Jane Fonda and brother-in-law Roger Vadim in Roscoff, Brittany, Peter Fonda would spend up to 4 hours a day working on the script that would become Easy Rider (1969). Terry Southern, who had worked on Barbarella (1968) with Vadim, visited the set and would help Fonda with his script, getting a co-writer credit on "Easy Rider" in the process.

Louis Malle had originally wanted then-model Florinda Bolkan to play the part that eventually went to Brigitte Bardot.

Only film to feature siblings Jane Fonda and Peter Fonda. They play cousins.