Boris Karloff

Imhotep, alias Ardath Bey

Zita Johann

Helen Grosvenor / Princess Anck-es-en-Amon

David Manners

Frank Whemple

Arthur Byron

Sir Joseph Whemple

Edward Van Sloan

Dr. Muller

Bramwell Fletcher

Ralph Norton

Noble Johnson

The Nubian Servant

Kathryn Byron

Frau Muller

Leonard Mudie

Professor Pearson

James Crane

The Pharaoh

Arnold Gray

Knight (scenes deleted)

Florence Britton

Nurse (uncredited)

Bill Elliott

Party Guest (uncredited)

C. Montague Shaw

Gentleman #1 at Party (uncredited)

Leyland Hodgson

Gentleman #2 at Party (uncredited)

Eddie Kane

Inspector's Assistant (uncredited)

George Regas

Egyptian at Princess Deathbed (uncredited)

Pat Somerset

Helen's Dancing Partner (uncredited)

Arthur Tovey

Nubian (uncredited)