He starred in the movies Cyborg, Universal Soldier, Best of the Best 2, The Viking Sagas, Batman & Robin, The Bad Pack, Gladiator, The Scorpion King, Beerfest, Pathfinder, Far Cry, Tales of the Ancient Empire, The Tourist, and Sabotage among others. Moeller also collaborated with the trance and techno group E Nomine. Perhaps not surprisingly, Ralf is good friends with fellow body builder Arnold Schwarzenegger. They are frequently photographed together at sporting events around the world.