Chris Hemsworth as Thor: Here is a brief history on the character he plays after the Jump... An Avenger and the crown prince of Asgard, based on the Norse mythological deity of the same name. About Thor's place in the film, Hemsworth said, "Well Thor stayed on Earth from [Thor: The Dark World]. So he's here. He's part of the team. This is his home for the moment. So the initial threat of attack from Ultron is personal. Thor then begins to see a bigger picture about what this threat could potentially be and it begins to tie into all of our films." Commenting on his portrayal of the character, Hemsworth said, "What becomes a challenge is trying to not repeat the same thing all the time. So you've got to work that bit harder to see what else you can do with the character." He added, "...it was just lightening up a bit. It gave us room to kind of make him a little more grounded and human and have him in some civilian clothes and mixing it up a