Ralf Rudolf Moeller is a German actor and former competitive bodybuilder. He is 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.

Conan the Barbarian is a fictional sword and sorcery hero who originated in pulp magazines and has since been adapted to books, comics, films, television programs, video games, and role-playing games. Robert E. Howard created the character in 1932 for a series of fantasy stories published in Weird Tales magazine.