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: The passing reference to "The Count of Monte Cristo" made right before Joe kills a guard at the "prison" is a small nod to the original Korean version of the film. "The Count of Monte Cristo" is referenced and paid homage to several times during the original film.