Dafne Keen and Nick Frost star in the upcoming horror film Whistle with the official trailer now released.

A misfit group of unwitting high school students stumble upon a cursed object, an ancient Aztec Death Whistle. They discover that blowing the whistle and the terrifying sound it emits will summon their future deaths to hunt them down. As the body count rises, the friends investigate the origins of the deadly artifact in a desperate effort to stop the horrifying chain of events that they have set in motion.

Aside Keen and Frost, the cast includes Sophie Nélisse, Sky Yang, Jhaleil Swaby, Ali Skovbye, Percy Hynes White, and Michelle Fairley.

The film is directed by Corin Hardy from a script by Owen Egerton.

Whistle will be unleashed in early 2026.