In a bonus feature from the film's May 13 digital release, Benj Pasek & Justin Paul, star Rachel Zegler and producers Jared LeBoff & Marc Platt discuss creating the music.

Whistle is helmed by The Nun director Corin Hardy, and also stars Sophie Nélisse, Sky Yang, Jhaleil Swaby, Ali Skovbye, Percy Hynes White, Michelle Fairley, and Shaun of the Dead actor Nick Frost.