Bela Lugosi
as The Frankenstein Monster
Lon Chaney Jr.
as The Wolf Man/Lawrence Stewart 'Larry' Talbot
Dwight Frye
as Rudi (a Vasarian)
Doris Lloyd
as Nurse (uncredited)
Don Barclay
as Franzec
Patric Knowles
as Dr. Frank Mannering
Ilona Massey
as Baroness Elsa Frankenstein
Lionel Atwill
as Mayor of Vasaria
Maria Ouspenskaya
as Maleva
Dennis Hoey
as Insp. Owen
Rex Evans
as Vazec
Harry Stubbs
as Guno
Martha Vickers
as Margareta (uncredited)