'The O.C ' star Mischa Barton has reportedly rekindled her romance with Brandon DavisSources claim the stunning actress is back in the arms of her ex-lover - but the pair are trying to keep their reunion secretA friend revealed: "Mischa doesn't want anybody to know about it yet, because she doesn't want people to think she's one of those girls who always breaks up and then gets back together"However, Mischa's spokesperson insists the couple are not back together but are just good friendsHe told America's E! Online website: "They are good friends now, but that's it. In fact, Mischa remains on excellent terms with all her exes All one of them" Mischa and Brandon - who split last month after a series of bust-ups - first began dating after being introduced at a charity fundraising event in February 2004

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