If you were a teenager between 2003 and 2010, we have news that will rock your world.

One of the most famous young TV stars of the era, Mischa Barton, is returning to a screen near you soon for a reboot — but not for The O.C. No, Barton is joining the cast of MTV’s The Hills, and this is the kind of mashup we never knew we needed until now.

Kevin Winter

People confirms that Barton will tag along with Audrina Patridge, Whitney Port, Heidi and Spencer Pratt, Brody Jenner, Jason Wahler, Stephanie Pratt, Justin Bobby, and Frankie Delgado for a new show that will follow the cast now, years after The Hills aired.

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Seriously, who would have expected Marissa Cooper to join forces with Speidi? 

RELATED: Why Lauren Conrad Won’t Be in The Hills Reboot

In a sad twist, Lauren Conrad and Kristin Cavallari are not down to clown and don’t have any public plans to re-join the franchise (Cavallari is busy with a reality show of her own at the moment), but with Barton joining the cast, we bet MTV will intrigue more fans regardless.