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)