Her new movie "New Moon" just raked in the third biggest box office opening of all time, and Ashley Greene is on top of her game.

And when it came to getting into shape for the film, the "Twilight" hottie revealed that she didn't have much of a problem dropping a few pounds.

Ashley explained, "It was really easy. We were working 12 hours a day, so it didn't leave too much time to eat. We had a personal trainer and then we also had fight training. It was a good four hours a day of training."

As for staying in shape during the off-season, Miss Greene relies on Pilates. "I do it early in the morning. It wakes you up, and it's kind of refreshing. And that is basically it. Sometimes cardio. I am not a big weight person because when I do weights I build muscle mass."