All Cast
Olivia Cooke
Amanda
Anya Taylor-Joy
Lily
Anton Yelchin
Tim
Paul Sparks
Mark
Francie Swift
Cynthia
Kaili Vernoff
Karen
Alyssa Fishenden
Jessica
Jackson Damon
Phil
James Haddad
Michael
Nolan Ball
Delivery Guy
Celeste Oliva
Receptionist
Stephanie Atkinson
Knitting Therapist (uncredited)
Lauren Laperriere
Mental Patient (uncredited)
Thomas Dings
Teenager (uncredited)
Leah Procito
Doctor (uncredited)
Alex Wolff
Party Friend (uncredited)
Xavier Dillingham
Party Goer (uncredited)
Jack Norton
Mental Patient (uncredited)