I have really long hair, so I don't cut it all that often. Sometimes, when I'm working, I just have the stylist on set trim it for me. I don't dye my hair. When I was a teenager, I dyed my hair five colors at one time. It was all different shades of red going from more orange to more purple. I thought I looked so cool.
In 'Thor,' that was my own hair. I grew it out. But I have naturally curly, blonde hair, so I'll never look like that. By the time I got to 'The Avengers,' I had come off two other films, which required me to have it very short. So I dyed it again and it was long enough to use a part of my hairline.