Her role on The O.C. helped inspire Laguna Beach. Now, after more than a decade, she's doing a reality crossover.

Mischa Barton was having a rough week. Ziggy, her beloved canine companion, had just died; she was grieving. Still, there were things to look forward to, like the screenplays stacked atop the glass table in center of her living room.

"I just started reading scripts again, which is a good thing," Barton, 33, said. "But it means I'm not really reading novels properly."

The actress has taken a few dozen roles since leaving The O.C. in 2006. None has managed

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