Kate Bosworth at the Whitney Art Party

Kate Bosworth at the Whitney Art Party

Kate Bosworth reminded us exactly why the LBD is the classic party dress last night at the Whitney Art Party in NYC, sponsored by Theory and Saks. Accessorising her Theyskens' Theory dress with strappy black sandals and a simple clutch, the gorgeous actress let the dress do all the talking.Kate and beau Michael Polish looked like smitten teenagers at the bash celebrating their nearly one year anniversary. They spent the night gazing at each other, even inviting photographers to take pictures of them together.

The While We Were Here actress was later seen partying the night away alongside Elizabeth Banks, Emma Stone and Halle Berry.