Trivia: All of the entire cast performed their own singing.
Trivia: In the entire movie the word 'LEGO' is never spoken once.
Trivia: The film is a remake of Shakespeare's comedy play "The Taming of the Shrew".
Trivia: Richard Gere actually plays the piano - and he composed this piece himself.
Trivia: When Skroob's ship arrives at Planet Druidia, Colonel Sandurz says the ship is preparing for metamorphosis to which Lord Helmet says "Ready, Kafka?" Franz Kafka wrote the book "The Metamorphosis."
Trivia: As Oddball's Sherman tank rolls through a town, an old man gets up to look around the corner to observe the tanks passing through. After that scene, the old man had a heart attack and died immediately after. Donald Sutherland and members of the film crew tried to save him, but were unsuccessful. The film crew built the old man's coffin for his burial and the cast and crew raised money for his family. (01:30:00)
Trivia: When Kevin is in Buzz's bedroom, he finds in the box a picture of Buzz's girlfriend. This is actually a picture of the art director's son dressed up to look like a girl, because the director, Chris Columbus, thought it would be too harsh to make fun of a girl like that.
Trivia: Charlie Sheen stayed awake for 2 days to play the guy in the police station, so he could get the right look for the scene.
Trivia: A little foreshadowing - when the King first goes to the Poison Apple pub, a frog with ruby red lips asks him if she has met him before.
Trivia: The "Cinderella story" sequence was all improvised by Bill Murray.
Trivia: "Mad Dog" Tannen's actions after shooting Marty are a perfect homage by Thomas F Wilson to Lee Marvin in "The Man Who Shot Liberty Valance." He even gets the facial expressions, the mumbled and sarcastic thanks and the jaunty angle with which he holds the gun right.
Trivia: When Lamarr tells Le Petomane that his name is Hedley Lamarr and not Hedy, Le Petomane says that since it's 1874, Hedley could sue her. In 1974, actress Hedy Lamarr filed a lawsuit against Mel Brooks claiming the joke infringed on her privacy. The lawsuit was settled out of court.
Trivia: The dentist's name, P. Sherman, is a homage to the many Filipino crew members, whose native accent made the English word 'fisherman' sound like P. Sherman.
Trivia: Julie Delpy admitted that the only reason that she did this movie was because she needed to pay her rent.
Trivia: Arnold Stang broke his left forearm just days before his scenes were shot.
Trivia: Kathleen Marshall, who plays the role of Charlotte, is the director Garry Marshall's daughter.