Andrea Riseborough

Suze

Harry Melling

Arthur

Karl Glusman

Teddy

Demi Moore

Maureen

Ryan Simpkins

Dickie

Jake Choi

Lon

Karim Saleh

Gene

Matt D'Elia

Raymond

Jake Sidney Cohen

Russell

Cole Escola

Billy

Jaz Sinclair

Joanne

Alisa Torres

Ida

Yedoye Travis

Les

Marquis Rodriguez

Baker

Dana Ashbrook

Cal

Mary Lynn Rajskub

Lois

Chris Eigeman

Arthur's Father (voice) (uncredited)

Amanda Kramer

Sailor in bar (uncredited)