A lot of celebrities credit their work for their fabulous physiques. Actors aren't exactly stuck behind desks, and while some films and shows certainly require them to be more sedentary than others, they all require the actors to get up off the couch.

Liv Tyler is a great Fit Celeb role model. She keeps her figure lean and healthy without resorting to any extremes. She says she loves working out and loves the feeling of breaking a sweat, but admits that a lot of her workouts revolve around her work. For her last two movies, The Strangers and The Incredible Hulk she was required to do lots of running, screaming, crawling, and jumping, all day long.

Christina Ricci showed off how strong her training for her latest movie, Speed Racer, made her. She showed off her skills on Last Call with Carson Daly by doing a one-armed push-up, all while in heels.

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Liv Tyler was always on a diet. "I've been a model since I was 14, so I've been on a diet my whole life," said the actress in a recent interview with Glamour magazine.

But now that she's a mother, Tyler's dieting days are over. "I didn't want to think about myself or feel insecure about my career, I wanted to think about my child."

The 29-year-old star said that since delivering Milo, her 2-year-old son, she feels more confident.

Especially for a model and Hollywood actress, I can imagine the pressures to look a certain way must be intense. I think it's fantastic that Tyler has found a healthier, more balanced outlook on life now that she has a child.

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