Hillary Swank
Million Dollar Baby is a movie about a waitress who ends up becoming an underground boxer. Swank plays the main character, Maggie Fitzgerald, who undergoes a painful and quick training to get her up to fighting shape in a very short amount of time. Just like her character in the movie, Swank was forced to get extremely fit in a very short period of time.
90 Days to Make It
In just three months, Swank put on over 20 pounds of muscle by exercising for five hours a day, eating for two or three, and sleeping for pretty much the rest of it. Swank's transformation was so extraordinarily difficult that she doesn't ever want to replicate anything of the sort ever again.