<Li> Chris Hemsworth as Thor: The crown prince of Asgard, based on the Norse mythological deity of the same name . Hemsworth stated that the film addresses unresolved issues regarding Thor's relationships from previous films, "For Thor and Jane, there are some unanswered questions now, since obviously he didn't stop in and catch up with her in The Avengers . Thor might have some explaining to do in this one . And with Loki, we get down to the major bones of our conflict with everything that's come from Thor to Avengers to now ." Hemsworth added, "Thor's journey I think picks more so up from where we left the first one--About to take on the throne...and now coming to the realization of what responsibility comes with that . Also, Alan (Taylor) keeps talking about the dark side of that responsibility, and the secrets of being king or becoming sort of very political about what people need to know and what they want to know ." Hemsworth especially enjoyed the role of Thor in this film as he was able to, "...break him down and find his human qualities and his vulnerable side ." </Li> <Li> Natalie Portman as Jane Foster: An astrophysicist and Thor's love interest, who is brought from Earth to Asgard by Thor after she is infected with a mysterious energy . Producer Kevin Feige said, "(W) hile Thor was a fish out of water on Earth in the first two films (Thor and The Avengers), this time Jane is very much a fish out of water in Asgard ." Portman added, "It was a whole different adventure this time . Because Jane is the fish out of water . I didn't want to make it like Bill & Ted, or like a valley girl dumped into Shakespeareland ." Portman also said the film finds Jane at a different place in her life, "Jane has moved, so she's now in London, not in Santa Fe anymore . Obviously she has gone through missing Thor and also being upset at him because he didn't come knock on her door when he was on her planet . She's definitely been getting over that and trying to move on ." Hemsworth's wife Elsa Pataky stood in for Portman during the post-credits kissing scene due to a scheduling conflict . </Li> <Li> Tom Hiddleston as Loki: Thor's adoptive brother and nemesis, based on the deity of the same name, who forms an uneasy alliance with Thor against the Dark Elves . On where he wished to take the character in the film, Hiddleston said, "I'd like to take (Loki) to his absolute rock bottom . I'd like to see him yield, essentially, to his darkest instincts . Then, having hit rock bottom, maybe come back up . I think the fascination for me about playing Loki is that, in the history of the mythology and the comic books and the Scandinavian myths, is he's constantly dancing on this fault line of the dark side and redemption ." Hiddleston recalled, "When I met Alan (Taylor), he asked me how I thought I could do Loki again without repeating myself and I remembered talking with Kevin Feige when we were on the Avengers promotional tour . I said,' OK, you've seen Thor and Loki be antagonistic for two films now . It would be amazing to see them fight side by side . I've been the bad guy now twice, so I can't be again, or otherwise I shouldn't be in the film . So we have to find a new role for me to play ." </Li> <Li> Anthony Hopkins as Odin: The king of Asgard, father of Thor, and adoptive father of Loki, based on the deity of the same name, who disapproves of Jane Foster being in Asgard . Regarding Thor's relationship with his father, Hemsworth said, "(T) he conflict between Thor and Odin was so great in the first one...so, certainly they disagree as I think they always will at times but there's a far greater respect from each other . So it becomes, I guess, a more mature conversation, but there's more at stake this time, too . It's not sort of just their individual egos, the whole universe is at stake ." As to his approach Hopkins said, "I just play Odin like a human being, with maybe a little more dimension . I grow a beard, look hopefully impressive and keep it as real as possible ." </Li>

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