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

Joe Bonomo
Beast (uncredited)

Buster Brodie
Pig Man - a Little Beast (uncredited)

James Dime
Seaman (uncredited)

Charles Gemora
Gorilla on Pier (uncredited)

John George
Beast (uncredited)

Robert P. Kerr
Undetermined Role (uncredited)

Bob Kortman
Mr. Hogan (uncredited)

Robert Milasch
Beast (uncredited)

Constantine Romanoff
Beast (uncredited)

Duke York
Beast (uncredited)