Chris Hemsworth 'too big' for 'Thor' costume

Chris Hemsworth has revealed that he grew too muscular for his Thor costume.

The actor trained to the point that the outfit for his starring role in the upcoming Marvel Comics adaptation had to be altered.

"I got the part and immediately started looking at the comic books, and the guy is 500 pounds or something and looks like Schwarzenegger," he told the Los Angeles Times. "And I thought, 'OK, I'm not gonna get to that'. But I have to get bigger.

"[The filmmakers] kept saying, 'Yeah, get as big as you can, as big as you can'. And then I came back right before Christmas, just before we started the movie, and had a final sort of camera test and put the costume on and within a couple of minutes, my hands started going numb.

"And everyone was like, 'Yeah, that's not cool'. And I started getting pins and needles and you'd touch the skin and the blood wouldn't return to that area so quick. And I thought, 'OK, it doesn't fit'."

The ex-Home and Away and Star Trek actor has received support in his upcoming role from high-profile comics industry figures including Joss Whedon and former Marvel chief creative officer Joe Quesada.

Watch the Chris Hemsworth Thor interview below: