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13 Cast Members You Can Expect to See on The Hills Reboot
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Mischa Barton

Barton announced that she would be appearing on the show via Instagram. "The secret's out... I'm joining the cast of The Hills," she wrote. "When MTV approached me with the chance to be a part of the reality show that was inspired by The OC, it felt like the perfect opportunity for an irresistibly inviting new chapter."

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