He is Marvel's God of Evil and brother to King of the Avengers, Thor. With his trademark horned helmet and green attire, Loki is a shape shifter who can appear as many objects, such as a fly, a salmon, a mare or an elderly woman. He has appeared as the villain in many movies in the Marvel Cinematic Universe, including Thor (2011), The Avengers (2013), The Dark World (2013), Ragnarok (2017) and Infinity War (2018) and is played by Actor Tom Hiddlesten.