- Errol Flynn
- Geoffrey Thorpe
- Brenda Marshall
- Doña Maria
- Claude Rains
- Don José Alvarez de Cordoba
- Donald Crisp
- Sir John Burleson
- Flora Robson
- Queen Elizabeth
- Alan Hale
- Carl Pitt
- Henry Daniell
- Lord Wolfingham
- Una O'Connor
- Miss Latham
- James Stephenson
- Abbott
- Gilbert Roland
- Captain Lopez
- William Lundigan
- Danny Logan
- Julien Mitchell
- Oliver Scott
- Montagu Love
- King Phillip II
- J.M. Kerrigan
- Eli Matson
- David Bruce
- Martin Burke
- Clifford Brooke
- William Tuttle
- Clyde Cook
- Walter Boggs
- Fritz Leiber
- Inquisitor
- Ellis Irving
- Monty Preston
- Francis McDonald
- Kroner
- Pedro de Cordoba
- Captain Mendoza
- Ian Keith
- Peralta
- Jack La Rue
- Lieutenant Ortega
- Halliwell Hobbes
- Astronomer
- Alec Craig
- Chartmaker
- Victor Varconi
- General Aguirre
- Robert Warwick
- Frobisher
- Harry Cording
- Slavemaster
- Herbert Anderson
- Eph Winters
- Mary Anderson
- Maid of Honor
- Whit Bissell
- Gate Guard at Palace Entrance
- Edgar Buchanan
- Ben Rollins
- J.W. Cody
- Whipper
- Jim Corey
- Galley Slave
- Maurice Costello
- Man Carrying Spear
- Ray Dixon
- Boy Carrying Powder Keg
- Michael Harvey
- Sea Hawk
- Leyland Hodgson
- Officer
- Stuart Holmes
- (uncredited)
- Charles Irwin
- Arnold Cross
- Dave Kashner
- Whipper
- Colin Kenny
- Officer
- Crauford Kent
- Lieutenant
- Frank Lackteen
- Capt. Ortiz
- Lester Matthews
- Guard Officer
- Art Miles
- Drum Beater
- Gerald Mohr
- Spanish Messenger
- Leonard Mudie
- Castle Sentry
- Nestor Paiva
- First Slavemaster
- Jack Richardson
- (uncredited)
- Elizabeth Sifton
- Maid of Honor
- Jay Silverheels
- Native Lookout
- John Sutton
- Captain of the Guard
- David Thursby
- Driver
- Anthony Warde
- Whipper
- Leo White
- (uncredited)
- Frank Wilcox
- Martin Barrett
- Frederick Worlock
- Darnell
- Harry Worth
- Spanish Officer
