Trivia: Sarah Douglas' voice was dubbed over by actress Annie Ross who would play Vera Webster in Superman 3. Sarah's own voice was used in Superman 2: The Richard Donner Cut.
Trivia: In his biography, Gene Kelly has admitted that he knew Xanadu was a bad film, but found Olivia Newton-John a joy to work with and she helped him survive it.
Trivia: Due to the enormous number of stunts in this film, a total of 26 Volkswagen Beetles played the part of Herbie.
Trivia: When Father Malone discovers the journal, at the beginning of the movie, he opens it to a full page of text. We only see it very briefly but if you pause the film it appears to be some sort of joke. Here's a couple of extracts I could make out: "writing dumb shit in this fucking movie.." "...big tits, tatoos (sic)..." (00:06:41)
Trivia: Although Ferdy Mayne plays Jack Palance's father, he was only three years older than Palance.