And the handcuffs go to ... Sean Young -- who was busted by police at the official Oscar after party for allegedly getting physical with a security guard ... TMZ has learned.
Sources tell us ... Young was attending the Governor's Ball -- the annual fancy schmancy Oscar party thrown by the Academy -- when she allegedly got into a dispute with a security guard and made contact.
We're told the "Ace Ventura: Pet Detective" star was placed under citizens' arrest by security -- until LAPD arrived to take her into custody. Young was booked her for misdemeanor battery.
Story developing ...