Whistle

Dafne Keen

As Chrys Willet

Sophie Nélisse

As Ellie Gains

Sky Yang

As Rel Taylor

Jhaleil Swaby

As Dean Jackson

Alissa Skovbye

As Grace Browning

Percy Hynes White

As Noah Haggerty

Michelle Fairley

As Ivy Raymore

Nick Frost

As Mr. Craven

Mika Amonsen

As Tanner Church

Stephen Kalyn

As Mason "Horse" Raymore

Conrad Coates

As Clayton Jackson

Lanette Ware

As Maya Jackson

Christine Sahely

As Principal Flynn

Dina Pino

As Esme Raymore

Izaak Smith

As Pellington Coach

Vicki Kim

As The Recruiter

Cameron Norris

As Timmy

Carson Durven

As Charlie

Mikayla Kong

As Asha Nelson

Michael Koras

As Tommy

Louis Adams

As Doctor

Maynuka Sarwar

As Sexy Pennywise

Jack Beeston

As Booth Clerk

Clayton Scott

As Werewolf

Natasha Tracy Taylor

As Woman At Harvest Festival

Jee-Yun Lee

As Local Reporter

Brandon James Sim

As Mr. Craven Doppelgänger

Janaya Stephens

As Grace's Mom (uncredited)

Troy James

As Dead Dean (uncredited)

Ruth Chiang

As Rel's Mom (uncredited)

Julia Dyan-Porter

As EMT (uncredited)

Toria Summerville

As Old Crone / Dead Ellie (uncredited)

Matthew MacCallum

As Burnt Mason / Dead Dean / Bloated Jake (uncredited)

Ray Francis

As Bandaged Man (uncredited)

Kalie Hunter

As Dead Grace (uncredited)

Yuliya Stetsko

As Student (uncredited)

Liam Chase Trefry

As Student (uncredited)