The movie Thor: Ragnarok features Matt Damon in a cameo role as an Asgardian actor named Loki. Loki is known for his trickster ways and for being the adopted brother of Thor. In the film, Loki is asked by Thor to take on the role of Odin in a play that is meant to help lift the spirits of the Asgardian people. However, things go wrong when Loki's true identity is revealed and he is forced to flee. It is unclear why Damon agreed to take on this small role, but it was likely due to his interest in Marvel films or because he is a friend of director Taika Waititi.