TMZ has learned 18-year-old Barron Hilton, Paris' little brother, was arrested for DUI in Malibu at 8:30 AM this morning!
Cops tell TMZ he was driving a black Mercedes on Pacific Coast Highway with a passenger -- not one of his sisters-- when he was pulled over at a 76 gas station.
He's currently in the process of being booked at the Lost Hills Sheriff's station -- the same place Mel Gibson was taken.
UPDATE: Barron's been officially booked and is currently being held on $5000 bail.
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