I will never be a waif, swears Jaimie Alexander. I want to -market myself as a healthy-looking woman who is an action-star kind of girl. It appears that wont be a hard sell: The 25-year-old actress is currently shooting Thor, Kenneth Branaghs adaptation of the Marvel comic series in which the ancient Norse god comes to life on present-day Earth (Chris Hemsworth stars in the title role). Alexander plays the only female in Thors warrior packa part which required hours a day in the gym. Ive trained with lots of sharp objects for this role, she notes. (Training is not a new gig for Alexander; she was one of few girls on her Colleyville, Texas, high-school wrestling team.) Prior to Thors release next year, Alexander will appear in Love and Other Drugs, a comedy about the first Viagra salesman (Jake Gyllenhaal), in which she plays one of his many romantic interests. I had the best time with him, says Alexander of Gyllenhaal. He would randomly walk around as this gay German character in the makeup trailer. It got me every time.