
Age: 75
male
Stellan Skarsgård (born June 13, 1951) is a Swedish-American actor, known internationally for The Hunt for Red October and Good Will Hunting, as well as his supporting roles in the Pirates of the Caribbean, Mamma Mia!, and Marvel Cinematic Universe (MCU) franchises. Skarsgård is particularly associated with director Lars von Trier and has appeared in six of the Danish auteur's features: The Kingdom, Breaking the Waves, Dancer in the Dark, Dogville, Melancholia, and Nymphomaniac.

Billy Kaplan stands frozen, surrounded by Frost Giants, working for Loki. One giant raises a weapon. Then—A blinding beam of rainbow light tears through the sky. The Bifrost. Billy vanished. He awakes, breathless. Before him stands a tall guardian. “I am Heimdall, you are on Asgard.” “I'm Billy. Billy Kaplan.” Heimdall frowned. “I should not have brought you here, Midgardian. But you were in danger.” Moments later, the Frost Giant king, Laufey, emerges. “My son,” he growled, “requires safety to rule Midgard. But Thor seeks to bring him back. If he tries… war.” Heimdall replied sternly, “Then speak with Odin.” “I seek peace, not conflict,” Laufey said. “But if Thor interferes… war is certain.” Billy is led to the palace, meeting Balder the Brave and Lady Sif. They study him—his magic, his presence—so Asgardian, yet wholly Earth-born. Despite Odin’s pleas, Thor left for Midgard. War erupted. To stop it, Billy joins a peace mission to Jotunheim with Sif, Balder, and the Warriors Three. Talks failed. Battle began. In desperation, Billy casts a freezing spell across the realm, halting the fight. “I’ll restore it,” he told Laufey, “if you end this war.” Laufey agreed. Back on Asgard, Thor refuses the throne. Balder becomes king. “You have a place here,” Balder tells Billy. “I have to find my mom,” Billy said. “There’s a bigger war coming.” He returns to Earth. In the credits scene, Mephisto watches the timeline flare. “The prophecy stirs,” he whispers. His fall has only just begun.
