Flash Gordon

Buster Crabbe

as Flash Gordon

Jean Rogers

as Dale Arden

Frank Shannon

as Dr. Hans Zarkov

Charles Middleton

as Ming the Merciless

Priscilla Lawson

as Princess Aura

Richard Alexander

as Prince Barin

Jack 'Tiny' Lipson

as King Vultan

James Pierce

as Prince Thun

Theodore Lorch

as High Priest

Earl Askam

as Officer Torch

Richard Tucker

as Professor Gordon

George Cleveland

as Professor Hensley

Glenn Strange

as Gocko/Robot/Soldier

Lon Poff

as First High Priest

Constantine Romanoff

as Monkey Man (uncredited)