Gossip Girl cutie Sebastian Stan looked smart in a black blazer and navy tie.

Katharine McPhee showed off her short blond locks, wearing a basic black turtleneck sweater with jeans.

Kelly Rutherford was Upper East Side casual in a khaki trench and jeans.

Olivia Palermo also opted for bright color, wearing a bold green skirt with a blazer.

Supermodel Agyness Deyn channeled Boy George, wearing a masculine ensemble.

Amanda Peet opted for a more casual look, tossing on a chic leopard coat with jeans and a striped shirt.

Emma Roberts looked sweet in a graphic belted shift, which had hints of yellow.

Natalie Portman looked gorgeous in a royal blue bubble Jason Wu mini. The dress was belted with a contrasting silk sash. In her hands, Natalie held a bright yellow Christian Louboutin clutch.

Natalie had a flawless face, and pulled her hair back into a bun.