Jessica Biel enjoyed fashion's biggest night with longtime boyfriend Justin Timberlake, who donned a tux from his own William Rast line, while she channeled Old Hollywood glamour in a silk charmeuse gown.
Sienna Miller made a statement in a low-cut lace Pucci dress but got more buzz by bringing on-again beau Jude Law to the fete, which celebrated the Metropolitan Museum Costume Institute's "American Woman: Fashioning a National Identity."
What do Gisele Bündchen and Naomi Watts have in common? Both of their guys, Tom Brady and Liev Schreiber, suited up in Tom Ford tuxes, while they chose different designer duds – Bundchen in a daring leather mini while Watts wore a raspberry one-shoulder gown.
Stephen Lovekin / Getty, Evan Agostini / AP, Larry Busacca / Getty
Tell us, who do you think was the hottest belle and beau of the ball?