Rachel Bilson Let Herself Go Two Pieces

4/12/2012 8:30 AM PDT

Rachel Bilson Let Herself Go Two Pieces

Rachel Bilson has really shaped up nicely since "The O.C." ended five years ago.

The 30-year-old showed off her slammin' bod in a sexy bikini while on the beach in Barbados on Wednesday.

She's still one hot Summer.