Trivia: When composer Éric Serra showed Inva Mula, the Albanian soprano who was going to sing the Diva Dance, the sheet music for that part, apparently she laughed and said that it was impossible for the human voice to switch from high to low notes that quickly. She got her way: The part that ended up in the film is not a single piece of audio, rather it's several pieces stitched meticulously together.
Trivia: When the priest states that he has a theory on the advancing planet near the beginning of the film, the president tells him that he has '20 seconds.' Cornelius gives his theory - which takes exactly 20 seconds.
Trivia: In the movie, the bizarre Divine Language that Leeloo speaks was invented by Milla Jovovich and director Luc Besson. Milla Jovovich is multi-lingual, and by the end of filming the movie, the two of them had learned to speak it fluently, even engaging in full conversations in the language.
Trivia: When Leeloo is fleeing from the cops and is startled by the elevator that goes down past her, on the roof of a grey bus passing along side it, you can see "KG62" written on it. "KG" are Karen Goulekas' initials, the film's digital effects supervisor, and "62" is her birth year. This is confirmed on the DVD's visual effects commentary.
Trivia: During the opening credits, when the Earth rotates from the bottom of the screen to the left, listen carefully to the music. It is the same music played just after the Klingon ship goes back in time to 1986 in Star Trek IV: The Voyage Home (right after the heads of the Enterprise crew morph on screen).
Trivia: Director Luc Besson wanted Bruce Willis for the part of Korben Dallas, but decided to go with a lesser-known actor in order to save money. Upon being informed, Willis told Besson that they could "work something out" if he liked the script. Willis read the script, loved it, and agreed to do the film for a reduced upfront paycheck.