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
Henry Victor
The Saxon Warrior (scenes deleted)
Arnold Gray
Knight (scenes deleted)
Florence Britton
Nurse (uncredited)
Jack Deery
Party Guest (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)
Tony Marlow
Police Inspector (uncredited)
George Regas
Egyptian at Princess Deathbed (uncredited)
Nick Shaid
Egyptian (uncredited)
Pat Somerset
Helen's Dancing Partner (uncredited)
Arthur Tovey
Nubian (uncredited)