2010 Met Gala: Fashion's Biggest Party!

Hollywood's hottest stars – from Justin Timberlake and Jessica Biel to reunited flames Sienna Miller and Jude Law – celebrate the Metropolitan Museum Costume Institute's "American Woman: Fashioning a National Identity" in romantic, glamorous and daring looks

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MARION COTILLARD

Continuing to act as Dior's red carpet ambassador, the French beauty shines in a silver sequin Haute Couture gown from the brand, along with Dior shoes and clutch.