Henry M. Stanley
Eve Kingsley
Gareth Tyce
Jeff Slocum
Lord Tyce
Dr. David Livingstone (as Sir Cedric Hardwicke)
James Gordon Bennett Jr.
John Kingsley
Sir John Gresham
Mr. Cranston
Frederick Holcomb
Sir Oliver French (as Montague Shaw)
Sir Henry Forrester
Hassan
Colonel Grimes
Commissioner
David Webb (scenes deleted)
Mombay (scenes deleted)
Zucco (uncredited)
Sergeant (uncredited)
Bongo (uncredited)
Geographical Society Delegate (uncredited)
Mombay (uncredited)
Corporal (uncredited)
Morehead (uncredited)
Newspaperman in Office (uncredited)
Sir Francis Vane (uncredited)
Chuma (uncredited)
Newspaperman at Water Barrel (uncredited)
Senator (uncredited)
Chewing Native (uncredited)
Reporter at Dock (uncredited)
Messenger (uncredited)
Committeeman (uncredited)
Carmichael (uncredited)
Newspaperman with Pills (uncredited)
Susi (uncredited)
Lieutenant (uncredited)
Captain (uncredited)
Albert (uncredited)
Billy (uncredited)
Mace (uncredited)