Fans of The O.C., rejoice! Former stars of the hit series, Rachel Bilson [1] and Autumn Reeser met up for an adorable reunion on the set of Rachel's current show, Hart of Dixie. The duo were filming the show's finale in which Autumn has a guest appearance as Zoe 2.0 character Olivia Green [2]. They were all smiles posing together for the photo that Autumn posted to her WhoSay account [3]. Rachel, who has a baby on the way [4], flaunted her bump in a flirty black dress that matched Autumn's spaghetti strap look. Autumn captioned the photo, "Love this girl, such a pleasure to work w/ her again!! A mini #OC reunion on the finale ep of @CWHartofDixie..."