Errol Flynn was a friend of Barrymore's in Hollywood during the time frame depicted in the film.
After wrapping this production, Director of Photography Carl E. Guthrie would be shooting on the same sets for the low budget thriller "Frankenstein 1970" (1958).
In the opening Diana is seen reading a 1938 movie magazine with a young Errol Flynn on the cover.
Warner Brothers purchased the book the film is based on with the intention of starring Carroll Baker (then under contract) in an adaptation. When she declined on the grounds that she did not want to play "a nymphomaniac", they refused to lend her to an outside company to appear in "The Devil's Disciple" opposite Sir Laurence Olivier.