Peter Lorre

Doctor Gogol

Frances Drake

Yvonne Orlac

Colin Clive

Stephen Orlac

Ted Healy

Reagan

Isabel Jewell

Marianne (scenes deleted)

Sara Haden

Marie

Edward Brophy

Rollo

Henry Kolker

Prefect Rosset

Keye Luke

Dr. Wong

May Beatty

Françoise

Ian Wolfe

Henry Orlac, Stephen Orlac's Stepfather (Uncredited)

Edward Lippy

Pierre, Henry Orlac's Clerk (Uncredited)

Frank Darien

Lavin, Waxwork Proprietor (Uncredited)

Murray Kinnell

Charles, Theatre Official (Uncredited)

Rollo Lloyd

Varsac, Fingerprint Expert (Uncredited)

Karl Freund