Louis Hayward as Edward Jekyll / Dr. Henry Jekyll / Mr. Hyde

Jody Lawrance as Lynn Utterson

Alexander Knox as Dr. Curtis Lanyon

Lester Matthews as Sir John Utterson

Gavin Muir as Editor Richard Daniels

Paul Cavanagh as Inspector Stoddard

Rhys Williams as Michaels, Butler

Victor Adamson as Coachman (uncredited)

Patrick Aherne as Tenement Landlord (uncredited)

Matthew Boulton as Inspector Grey (uncredited)

Hamilton Camp as William Bennett (uncredited)

Claire Carleton as Hazel Sorelle (uncredited)

Patrick O'Moore as Joe Sorelle (uncredited)

Doris Lloyd as Lottie Sorelle (uncredited)

Wheaton Chambers as Magistrate (uncredited)

David Cole as Copy Boy (uncredited)

Alec Harford as Clerk (uncredited)

Robin Hughes as Alec (uncredited)

Olaf Hytten as Prosecutor (uncredited)

Joyce Jameson as Barmaid (uncredited)

Stapleton Kent as Mr. Arnim (Uncredited)

Bruce Lester as Daniels' Reporter (uncredited)

Leonard Mudie as Pharmacist (uncredited)

Vesey O'Davoren as Utterson's Butler (uncredited)

Harry Martin as Detective (uncredited)

Holmes Herbert as Constable (uncredited)

Leslie Denison as Constable (uncredited)

Keith Hitchcock as Constable (uncredited)

James Logan as Constable (uncredited)

Guy Kingsford as Nurse (uncredited)

Ottola Nesmith as Nurse (uncredited)

David Dunbar as Man in a Bar (uncredited)

Frank Hagney as Man in a Bar (uncredited)

Phyllis Morris as Tea Woman (uncredited)

Betty Fairfax as Woman in Window (uncredited)

Ida MacGill as Woman (uncredited)

Ola Lorraine as Woman (uncredited)

Carol Savage as Woman (uncredited)

Benita Booth as Woman (uncredited)