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Autumn Reeser, Rachel Bilson, Josh Schwartz and Stephanie Savage

Joshua Blanchard/Getty Images for Original Penguin

California here we come...right back where we started from!

This was especially true for Rachel Bilson Sunday at the premiere of the unauthorized O.C. musical! The actress, who played Summer Roberts on the beloved teen drama from 2003 to 2007, reunited with The O.C. creators Josh Schwartz and Stephanie Savage and former co-star Autumn Reeser, who played Taylor Townsend from 2005 to 2007. The O.C.'s Melinda Clarke (Julie Cooper) and Kelly Rowan (Kirsten Cohen) came out to L.A.'s The Montalban to see the event as well!

Tonight. #HereWeCome

A photo posted by The Unauthorized O.C. Musical (@theocmusical) on

Bilson, whose O.C. character was portrayed by Greer Grammer in the unauthorized musical version, seemed to enjoy revisiting her Orange County roots. According to an eyewitness, the 34-year-old mother of one (she and Hayden Christensen have a 10-month-old daughter, Briar Rose) was "smiling and swaying along to some of the musical numbers" throughout the show!

Now, if you're like us, you really want to see Summer, Marissa, Seth, Ryan and the gang back together onstage—but there's a catch: Last night's unauthorized O.C. musical, sponsored by Original Penguin, was a one-night only deal!

Don't completely abandon those California dreams, though—the show's Facebook page hinted there might just be an encore performance.

From all of us at #TheOCMusical -- Thank you. We had so much fun turning LA into The Bait Shop that we just may have to do it again. Maybe ;)

Posted by The Unauthorized O.C. Musical on Monday, August 31, 2015

As for whether we'll ever see the original O.C. stars back together? Never say never! Back in 2013, Bilson spoke to Us Weekly about a possible reunion, saying, "If everyone wanted to do it, I'm sure it would be fun." 

—Reporting by Sara Kitnick