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: There is no "That's all, Folks!" title card after the fade out. Just "The End" with white letters on a black background.
Trivia: As Finian and Sharon Mc Lonergan make their way across America during the opening credits, one of the recognizable locations they pass is the iconic schoolhouse in Bodega, California, made famous in a memorable scene from Alfred Hitchcock's "The Birds." (00:05:06)
Trivia: Despite having only 17 minutes of screen time, Spencer Tracy received the first of his nine Oscar nominations for his performance as Father Mullin in this film.
Trivia: This was the first biographical film to win the Academy Award for Best Picture.
Trivia: Jim Henson's daughter, Heather, has a cameo as the girl serving drinks at the Bavarian Festival.