Ralf Rudolf Möller (born January 12, 1959) is a German-American actor and former competitive bodybuilder. He is best known for his roles of Brick Bardo in Cyborg, Kjartan in The Viking Sagas, the title character in the television show Conan the Adventurer, Hagen in Gladiator, Thorak in The Scorpion King and Ulfar in Pathfinder.