The Twilight Saga: New Moon star Ashley Greene, 22, revealed that she had to watch her weight on the set of the film because her character is supposed to look like a teenager, reports Daily News. The actress, who plays Alice Cullen, didn’t have a hard time keeping slim, however. She said, “It was really easy. We were working 12 hours a day, so it didn’t leave too much time to eat.” Though her comment about not eating may make her reps cringe, Greene also worked out for the film. She explained, “We had a personal trainer and then we also had fight training. It was a good four hours a day of training.” When not on set, her favorite exercise is Pilates. “I do it early in the morning. It wakes you up, and it’s kind of refreshing,” she said. Greene will return to her role as a vampire next year in the third installment of the film franchise, The Twilight Saga: Eclipse.