Photo SpecialAll Grown Up & Hot

Even Scarlett and Mischa had their awkward teen years. See just how far they and others (Katie! Lindsay!) have come. By Janice Morris

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MISCHA BARTON

THEN: Her wide-eyed innocence startled viewers in 1999's The Sixth Sense.
NOW: Barton, 20, is one of PEOPLE's Most Beautiful. "The depths and size of her eyes, the structure of her chin, a delicate nose and soft flowing hair – all the highlights of history's most beautiful women," her O.C. producer McG says.

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