By Christine Spines
Updated October 18, 2009 at 12:00 PM EDT

Police say Stephanie Pratt, the 23-year-old star of MTV reality show, The Hills, was arrested early Sunday morning on suspicion of driving under the influence reports the AP. Pratt was arrested outside a party in Hollywood and booked into a jail in the San Fernando Valley. She was released several hours later after posting $5000 bail.