Buster Crabbe

Flash Gordon

Jean Rogers

Dale Arden

Frank Shannon

Dr. Hans Zarkov

Charles Middleton

Ming the Merciless

Priscilla Lawson

Princess Aura

Richard Alexander

Prince Barin

Jack 'Tiny' Lipson

King Vultan

James Pierce

Prince Thun

Theodore Lorch

High Priest

Earl Askam

Officer Torch

Richard Tucker

Professor Gordon

George Cleveland

Professor Hensley

Glenn Strange

Gocko/Robot/Soldier

Lon Poff

First High Priest

Constantine Romanoff

Monkey Man (uncredited)