The Monster (as Karloff)

Boris Karloff

Henry Frankenstein

Colin Clive

Mary Wollstonecraft Shelley/The Monster's Mate

Elsa Lanchester

Dr. Henry Frankenstein

Colin Clive

Elizabeth Frankenstein

Valerie Hobson

Doctor Pretorius

Ernest Thesiger

Lord Byron

Gavin Gordon

Hermit

O.P. Heggie

Percy Shelley

Douglas Walton

Minnie

Una O'Connor

Burgermeister

E.E. Clive

Bürgomaster (uncredited)

E. E. Clive

Albert (the butler)

Lucien Prival

Percy Shelley

Douglas Walton

Hermit

O.P. Heggie

Karl

Dwight Frye

Hans

Reginald Barlow

Hans' wife

Mary Gordon

Shepherdess

Ann Darling

Ludwig

Ted Billings

Peasant (uncredited)

Walter Brennan

Priest

Lucio Villegas

Hunter (uncredited)

John Carradine

Coroner

Edwin Mordant

Woman

Grace Cunard

Archbishop (uncredited)

Norman Ainsley

Ballerina (uncredited)

Kansas DeForrest

Woman

Helen Gibson

Miniature King

Arthur S. Byron

Little Mermaid (uncredited)

Josephine McKim

Ludwig (archive footage) (uncredited)

Michael Mark

Miniature Queen

Joan Woodbury

Baby (uncredited)

Billy Barty

Hunter in Woods (uncredited)

Robert Adair

Miniature Devil

Peter Shaw

Villager (uncredited)

Frank Benson

Gypsy (uncredited)

Maurice Black

Villager (uncredited)

Mae Bruce

Communion Girl

Helen Parrish

King Homunculus (uncredited)

A.S. Byron

Hunter

Robert A'Dair

Procession Leader (uncredited)

D'Arcy Corrigan

Hunter

Frank Terry

Mother

Brenda Fowler

Hunter (uncredited)

Jack Curtis

Uncle Glutz (uncredited)

J. Gunnis Davis

Neighbor

Rollo Lloyd

Gypsy's Mother (uncredited)

Elspeth Dudgeon

Neighbor

Mary Stewart

Gypsy's Wife (uncredited)

Helen Jerome Eddy

Uncle Glutz

Gunnis Davis

Rudy (uncredited)

Neil Fitzgerald

Aunt Glutz

Tempe Pigott

Mother (uncredited)

Brenda Fowler

Villager (uncredited)

John George

Rudy, Second Graverobber

Neil Fitzgerald

Girl (uncredited)

Marilyn Harris

Marta

Sarah Schwartz

Neighbor (uncredited)

Rollo Lloyd

Villager

Edward Peil Sr.

Victim in flashback (uncredited)

Torben Meyer

Villager

Anders Van Haden

Gypsy

Maurice Black

Maid (uncredited)

Dorothy Vernon

King

A.S. 'Pop' Byron

Priest (uncredited)

Lucio Villiegas

Gypsy's Mother

Elspeth Dudgeon

Dr. Septimus Pretorius

Ernst Thesiger

Auntie Glutz

Tempe Piggott

King

Monte Montague

Director

James Whale

Director

James Whale