Trivia: The first sound film to win the Academy Award for Best Picture.
Trivia: Fievel was named after Steven Spielberg's grandfather.
Trivia: At the end of the movie, there is a double wedding at sea with the ship's captain officiating. Most people assume that a ship's captain automatically has that authority. However, in order to officiate at a wedding at sea, the captain also must be a minister, a judge or justice of the peace, or a Notary Public.
Trivia: Anthropology Professor Robert Orwell Sutwell is writing a book about the sex habits of teenagers. His secretary tells him, "Hang on to the movie rights. American-International will snap it up in a minute." American-International is the real-life Los Angeles studio which produced several teen-oriented films, including "Reform School Girl," "Hot Rod gang," "I Was A Teenage Werewolf" - and "Beach Party."
Trivia: When the cows push Junior down the mine shaft, a "Goofy Holler" can be heard.
Trivia: Adele Jergens plays Mae Martin, the mother of Peggy Martin (Marilyn Monroe). In real life, Jergens was only nine years older than Monroe.
Trivia: Eddie Murphy, who received a Best Supporting Actor nomination for this film at the Academy Awards, reportedly stormed out of the building after losing the award to Alan Arkin.
Trivia: When the man is released from the Psychopathic Hospital, he spots the construction site when he originally found the frog. The man then hides the box in the cornerstone of the future "Tregoweth Brown Building" - a reference to the Warner Brothers sound editor Treg Brown.
Trivia: During the filming, Charles Bronson did not speak to Elvis Presley off camera and avoided going near Presley as often as possible.
Trivia: Judy Tyler and her husband were both killed in a road accident on July 3, 1957, just three days after production was completed and before its premiere. Elvis Presley was so devastated by her death that he refused to watch the movie.
Trivia: Near the end, during their extended nonsense bit about the stolen Beaugard painting, both Chico and Groucho were rapid-fire ad-libbing so heavily that they became irritated with one another. In fact, by the time Groucho ad-libbed, "I'd buy you a parachute if I thought it wouldn't open," he was getting really pissed off at Chico's faster and funnier come-backs. Almost instantly, Chico shot back, "Hey, I already got a pair-uh-shoes!" (which was, again, funnier than Groucho's parachute line). At that point, Groucho snapped and sprang into some improvised physical comedy, falling backwards across the card table and elbowing Chico right in the face, perhaps on purpose. Genuinely shocked from the blow, Chico recoiled wide-eyed, looked toward director Victor Heerman off-camera, and angrily exclaimed, "He's crazy!" (referring to Groucho).
Trivia: There is no "That's all, Folks!" title card after the fade out. Just "The End" with white letters on a black background.