Harry D'Amour
Philip Swann
Dorothea Swann
Valentin
Nix
Butterfield
Caspar Quaid
Jennifer Desiderio
Vinovich
Young Dorothea
Young Butterfield
Loomis
Ray Miller
Maureen Pimm
Clemenzia
Detective Edison
Forensic Photographer
Tapert
Dr. Toffler
Snakeman
Exorcised Boy
Hotel Bellboy
Stage Technician
Walter Wilder
Billy Who
Nurse
Dancer
Swann Audience Member (uncredited)
Bar patron (uncredited)
Cult Member (uncredited)
Lead Female Cultist