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  • MISCHA BARTON photo | Mischa Barton

Credit: Kevin Mazur/WireImage

Updated: Friday Nov 21, 2008 | 11:25 AM EST

MISCHA BARTON

The actress is the picture of spring at the Atlantis opening in a draped floral-printed one-shoulder Matthew Williamson gown accented with cuffs at her arm and wrist.