Dafne Keen

Chrys Willet

Sophie Nélisse

Ellie Gains

Sky Yang

Rel Taylor

Jhaleil Swaby

Dean

Alissa Skovbye

Grace Friedkin

Percy Hynes White

Noah Haggerty

Stephen Kalyn

Mason Horse Raymore

Michelle Fairley

Ivy Raymore

Nick Frost

Mr. Craven

Janaya Stephens

Grace's Mom

Lanette Ware

Maya Jackson

Mika Amonsen

Tanner

Troy James

Dead Dean

Cameron Norris

Timmy

Maynuka Sarwar

Sexy Pennywise

Ruth Chiang

Rel's Mom

Julia Dyan-Porter

EMT

Toria Summerville

Old Crone / Dead Ellie

Christine Sahely

Principal Flynn

Mikayla Kong

Asha