Although Neagle performed several musical numbers for the film, most of them were cut from the final release, leaving her with essentially a supporting role.

In addition to performing stunts for the film, Smith has a small role as the character Grim.

The actors performed their own music for the film.

Playing the role of a frustrated pianist, Ha performed on the piano herself for the film.

Vin Diesel also wrote and performed music for the film.

Siren performed all material for the film without any prior rehearsals.

He also performed several stunts for the film, including the scene where Lee's character quickly climbs a rooftop at night.

He insisted on performing his own motorcycle stunts for the film.

He also performed all of the violin solos for the film.

He performed the song "Bice bolje" for the film of the same name.