 Boris KarloffImhotep / Ardath Bey | Imhotep / Ardath Bey |
 Zita JohannHelen Grosvenor / Princess Anck-es-en-Amon | Helen Grosvenor / Princess Anck-es-en-Amon |
 David MannersFrank Whemple | Frank Whemple |
 Arthur ByronSir Joseph Whemple | Sir Joseph Whemple |
 Edward Van SloanDr. Muller | Dr. Muller |
 Bramwell FletcherRalph Norton | Ralph Norton |
 Noble JohnsonThe Nubian Servant | The Nubian Servant |
 Kathryn ByronFrau Muller | Frau Muller |
 Leonard MudieProfessor Pearson | Professor Pearson |
 James CraneThe Pharaoh | The Pharaoh |
 Henry VictorThe Saxon Warrior (scenes deleted) | The Saxon Warrior (scenes deleted) |
 Arnold GrayKnight (scenes deleted) | Knight (scenes deleted) |
 Florence BrittonNurse (uncredited) | Nurse (uncredited) |
| JJack DeeryParty Guest (uncredited) | Party Guest (uncredited) |
 Bill ElliottParty Guest (uncredited) | Party Guest (uncredited) |
 C. Montague ShawGentleman #1 at Party (uncredited) | Gentleman #1 at Party (uncredited) |
 Leyland HodgsonGentleman #2 at Party (uncredited) | Gentleman #2 at Party (uncredited) |
 Eddie KaneInspector's Assistant (uncredited) | Inspector's Assistant (uncredited) |
| TTony MarlowPolice Inspector (uncredited) | Police Inspector (uncredited) |
 George RegasEgyptian at Princess Deathbed (uncredited) | Egyptian at Princess Deathbed (uncredited) |
| NNick ShaidEgyptian (uncredited) | Egyptian (uncredited) |
 Pat SomersetHelen's Dancing Partner (uncredited) | Helen's Dancing Partner (uncredited) |
 Arthur ToveyNubian (uncredited) | Nubian (uncredited) |
| CCahit IrgatYoung Bald | Young Bald |
