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