‘The O.C.’ Cast: Where Are They Now? (PHOTOS)

Tonight marks the much-anticipated return to television for former O.C. star Rachel Bilson, who now has her sights set on the South in the CW medical dramedy, Hart of Dixie.

To honor this occasion, we’re taking a look back at her former co-stars to find out what they’ve been up to since The O.C. went off the air in 2007.

Need a refresher on what happened to Mischa Barton, Benjamin McKenzie and Adam Brody? Click through our gallery for all of the latest post-O.C. updates.