This morning, we were lucky to be part of a press only conference call set up by NBC for Chuck, one of the fall's most talked about and highly-anticipated new shows. Star Zachary Levi and co-creator Josh Schwartz (The OC) took questions from the press and discussed everything Chuck-related, including some big time casting news. It was announced today that Rachel Bilson of The OC will guest-star on a couple of upcoming Chuck episodes as a possible love interest for lead character Chuck Bartowski. Here's the play-by-play from this morning's call.