George MacKay
Jack Marrowbone
Anya Taylor-Joy
Allie
Charlie Heaton
Billy Marrowbone
Mia Goth
Jane Marrowbone
Matthew Stagg
Sam Marrowbone
N
Nicola Harrison
Rose Marrowbone, Mother
Kyle Soller
Tom Porter
Tom Fisher
Simon Fairbairn, Father
Myra Kathryn Pearse
Molly
Paul Jesson
Doctor
Robert Strange
Monster
L
Laura Brook
Thelma (uncredited)
Adam Quintero
Mr. Gouldman (voice) (uncredited)