Rachel Bilson @ Chanel Party 2007

Rachel Bilson makes her bejeweled Chanel dress her own by wearing it back to front at a benefit for P.S. Arts at the Chanel boutique in Beverly Hills on Thursday.

The ever-stylish actress also attended the after-party held at CUT inside the Beverly Wilshire.

The former O.C. star will reunite with O.C. creator Josh Schwartz for a guest spot on NBC’s new comedy Chuck, which premieres tonight @ 8PM ET/PT leading out Heroes. Bilson will play a romantic option for Chuck (Zachary Levi) in a multi-episode arc scheduled to air in late October.

10+ pictures inside of Rachel @ the Chanel party….