The "Ace Ventura: Pet Detective," "A Kiss Before Dying" and "Blade Runner" star didn't have a ticket to the Academy of Motion Picture Arts and Sciences' Governors Ball, but was taking photos with celebrity friends such as Sandra Bullock, Michelle Williams, Angelina Jolie and Brad Pitt outside the event when security officers asked her to leave, the entertainment news Web site said.
Young was booked on a misdemeanor battery charge and released from police custody early Monday. She is accused of hitting a security guard who allegedly put his hand on her arm as he told her it was time to go, TMZ said.
The actress has a history of substance abuse and erratic behavior. She has spent several stints in treatment centers and appeared on TV's "Celebrity Rehab with Dr. Drew."