Jake Gyllenhaal
Adam / Anthony

Mélanie Laurent
Mary

Sarah Gadon
Helen

Isabella Rossellini
Mother

Joshua Peace
Teacher at School

Tim Post
Anthony's Concierge

Kedar Brown
Security Guard

Darryl Dinn
Video Store Clerk

Misha Highstead
Lady in the Dark Room

Megan Mane
Lady in the Dark Room

Kiran Friesen
Sad, Broken Woman (uncredited)

Loretta Yu
Receptionist (uncredited)

Stephen R. Hart
Bouncer (uncredited)