Isabel Lucas Identified as Passenger in Shia LaBeouf Car Accident

's 23-year-old co-star in "Transformers: Revenge of the Fallen," was the unfortunate passenger in the crash that flipped the actor's truck in the early morning hours on Sunday.

LaBeouf, 22, was at the Troubadour club on Santa Monica Boulevard Saturday evening watching the Lemon Son band.

"He was dancing around and acting really crazy," according to a source. "He kept doing shots of whiskey.

"He stayed until the band was done and then stumbled out of the club by himself," the witness reported.

Shia was arrested for DUI and was taken to Cedars-Sinai Medical Center where he underwent extensive surgery for a hand injury sustained during the accident.

Lucas, who is reportedly dating Entourage star Adrian Grenier, was treated for minor head injuries and released. According to her publicist, the actress is "at work, on the set of Transformers and is fine''.

View photos from the car accident.

photo: Wenn