Scarlett Johansson has revealed why she dyed her hair red — to land a movie role! The Lost in Translation actress went from blond to redhead to get the role of the Black Widow in Iron Man 2 and to impress director Jon Favreau. “When I met Jon Favreau the second time I had red hair,” explains Scarlett. “Part of that was me wanting to experiment with my hair color and the other part of that was me kind of hoping that Jon would like the fact that I had experimented and that would help me get the role.” Johansson, 24, recently revealed how she prepared herself for her role as the Black Widow. “I kicked some major butt,” she told People magazine. “It was many, many, hours, days, and months of stunt training and strength training, but it’s fun because I had a goal. The goal was the Lycra catsuit. “You put that much work into something and you put it on and you better be happy with it. “It was crazy to see [the catsuit] for the first time – everything all zipped up and all the weapons in there, bracelets on, the whole look. It was pretty sweet, I have to say,” she explains.