Humans turned into Minimoys have five fingers, real Minimoys have four (as all other speaking species seen), and the King's mount, only three.
Director Luc Besson said that this would be his last movie as a director, but later changed his mind.
The father mole's name "Miro" means "poor sight" in French slang, matching mole's poor sight reputation.
(At around one hour and two minutes) The intro to David Bowie's song "Let's Dance" plays at the beginning of the fight song on the record player. David Bowie is also the voice of Maltazard in the English version of the film.
The sacred sword that no one (not even Princess Selenia) can pull out of the stone (she implies that only the chosen one can pull it out) but Arthur can pull out easily is an homage to King Arthur and the legend of the Sword in the Stone. King Arthur (with whom the main character of this movie shares a name) becomes King when he can pull a sword from the stone in which it was stuck when no one else could.