Rachel Bilson Films CHUCK

Rachel Bilson heads back to work, filming scenes for NBC’s new spy comedy Chuck in West Hills, Calif. on Friday.

The former O.C. cutie reunited with O.C. creator Josh Schwartz on set. Bilson will play a romantic option for geek-turned-government-agent Chuck (Zachary Levi, pictured) in a multi-episode arc scheduled to air in late October.

Pocket protectors may soon become the hottest fashion accessory yet!

All new-episodes of Chuck air on Mondays @ 8PM ET/PT, leading out Heroes every week.