Rachel Bilson is the Ultimate Bachelorette

Rachel Bilson hosts the Ultimate Bachelorette Party held at The Bank nightclub at Bellagio Resort Hotel and Casino in Las Vegas on Friday night.

The 27-year-old former OC actress has kept a fairly low profile lately, but will be getting busy in her personal life.

Ms. Bilson will serve as maid of honor at the wedding of Josh Schwartz and his fiancee Jill! Josh is the creator of The OC, Gossip Girl, and Chuck, among others.

10+ pictures inside of Rachel Bilson, the ultimate bachelorette…