"It's an amalgamation of a bull and a lava-like creature. He has very animalistic tendencies but with this insatiable and unstoppable power. As an actor, that's one of the hardest things to embody. You have to realize you are probably the most powerful thing you could imagine. And you have to be that. You can't pretend, so that when you face Thor, it's real."
He also spoke about the bulky costume he had to wear on the set, which weighed 40 pounds.
"The outfit weighed about 40 pounds. I'm sure there will be a certain amount of CGI but a good 80% was me in that suit. The outfit informed how I was going to move - the horns - his fighting style as well. It's almost like he's made out of stone."
Thor: The Dark World was released November 8th, 2013 and stars Chris Hemsworth, Natalie Portman, Tom Hiddleston, Anthony Hopkins, Christopher Eccleston, Jaimie Alexander, Zachary Levi, Ray Stevenson. The film is directed by Alan Taylor.