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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JESSICA BIEL AND JUSTIN TIMBERLAKE

It's Old Hollywood come to life as Biel celebrates the silver screen siren in her slinky Ralph Lauren Collection silk charmeuse gown, accessorized with a clutch and heels from the designer with '20s Fred Leighton diamonds – and her dashing beau, Timberlake (in a William Rast tuxedo).