Flash Gordon
Dale Arden
Ming the Merciless
Princess Aura
Dr. Alexis Zarkov
Prince Barin [Chs. 5-13]
King Vultan [Chs. 5-13]
High Priest #2 [Chs. 8-11, 13]
Professor Gordon
Professor Hensley
Prince Thun [Chs. 2-9, 12-13]
King Kala [Chs. 2-5] (as Duke York Jr.)
Zona [Ch. 4]
Officer Torch
Shark Man [Chs. 3-4]
Hawkman Throne Room Guard (uncredited)
Throne Guard (uncredited)
Woman in Ming's Palace (uncredited)
Transcontinental Plane Steward (uncredited)
Earth Radio Scientist (uncredited)
Sharkman / Ming's Soldier (uncredited)
shark Man (uncredited)
Shark Man (uncredited)
Orangopoid (uncredited)
Hawkman Lookout Captain (uncredited)
Spaceograph Operator (uncredited)
Sharkman (uncredited)
(voice) (uncredited)
Aura's Handmaiden (uncredited)
Airplane Pilot (uncredited)
Robot / Ming's Soldier (uncredited)
Ming's Soldier (uncredited)
Atom Furnace Slavedriver (uncredited)
Monkey Man (uncredited)
High Priest #1 (uncredited)
Priestess of Tigron (uncredited)
Soldier with Drugged Wine (uncredited)
Plane Passenger (uncredited)
Robot / Ming's Soldier / Gocko (uncredited)
Prison Guard (uncredited)
Pit Control Operator (uncredited)