The former O.C. star will reunite with O.C. creator Josh Schwartz for a guest spot on NBC’s new comedy Chuck.

Bilson will play a romantic option for Chuck (Zachary Levi) in a multi-episode arc scheduled to air in late October, according to USA Today.

Chuck is about an “average computer-whiz-next-door” who receives an encoded e-mail from an old friend, a rogue CIA agent, which embeds the world’s greatest spy secrets in his brain. The series is scheduled to premiere on Monday, Sept. 24 on airing on Monday nights at 8PM ET/PT leading out Heroes.