Rachel Bilson: No Engagement Ring!

Rachel Bilson keeps her engagement under wraps by not wearing an engagement ring to the Brian Reyes Fall 2009 fashion show at New York City’s Bryant Park on Thursday (February 19).

Other pictures include the 27-year-old former O.C. actress relaxing at the W Lounge during Mercedes-Benz IMG New York Fashion Week.

Rachel has been in town with her mom, sex therapist Janice Stango. Fiance Hayden Christensen is back running errands in Los Angeles.

UPDATE: The ring has been found! RB has been seen shopping with her ring. Check it out here!

15+ pictures inside of engagement ring-less Rachel Bilson…