Charles Brown Middleton was an American stage and film actor. During a film career that began at age 46 and lasted almost 30 years, he appeared in nearly 200 films as well as numerous plays. Sometimes credited as Charles B. Middleton, he is perhaps best remembered for his role as the villainous emperor Ming the Merciless in the three Flash Gordon serials made between 1936 and 1940.

Ming the Merciless is a fictional character who first appeared in the Flash Gordon comic strip in 1934. He has since been the main villain of the strip and its related movie serials, television series and film adaptation. Ming is depicted as a ruthless tyrant who rules the planet Mongo.