Trivia: In the scene where Anna is outside the gates during "For The First Time in Forever", you can see the backs of Flynn and Rapunzel from "Tangled".
Trivia: During production, Sylvester Stallone suffered a gash in his right foot whilst filming a fight scene. The injury required 70 stitches.
Trivia: The first entirely English-language film made by acclaimed South Korean director Park Chan-Wook.
Trivia: Originally, famed director Steven Spielberg was attached to direct the film with Will Smith reportedly in talks to play the lead. At this point in development, the film was going to be a more direct adaptation of the original Japanese manga, which differed greatly from the 2003 Korean film adaptation. However, legal issues forced Spielberg and Smith to withdraw from the project. Eventually the legal issues were settled, but the studio had subsequently decided to drop the idea of adapting the manga and instead decided to do a more direct remake of the Korean film due to its critical acclaim and strong cult-following.