Charles Laughton
Dr. Moreau
Richard Arlen
Edward Parker
Leila Hyams
Ruth Thomas
Bela Lugosi
The Sayer of the Law
Kathleen Burke
Lota the Panther Woman
Arthur Hohl
Montgomery
Stanley Fields
Capt. Davies
Paul Hurst
Capt. Donahue
Tetsu Komai
M`ling
George Irving
Consul
Buster Brodie
Pig Man - a Little Beast (uncredited)
James Dime
Seaman (uncredited)
Charles Gemora
Gorilla on Pier (uncredited)
John George
Beast (uncredited)
Bob Kortman
Mr. Hogan (uncredited)
Robert Milasch
Beast (uncredited)
Constantine Romanoff
Beast (uncredited)
Duke York
Beast (uncredited)
Hans Steinke
Ouran
Jack Bardette
Undetermined Role (uncredited)
Evangelus Berbas
Undetermined Role (uncredited)
Joe Bonomo
Beast (uncredited)
Jacob Dance
Beast (uncredited)
Harry Ekezian
Gola (uncredited)
Rosemary Grimes
Samoan Girl (uncredited)
Robert P. Kerr
Undetermined Role (uncredited)
Schlitzie
Furry Manimal (uncredited)
Jack Walters
Undetermined Role (uncredited)