ET has confirmed that ‘Transformers: Revenge of the Fallen’ actress Isabel Lucas, was the mystery passenger in Shia LaBeouf’s weekend truck accident and went back to work on the movie’s set on Monday.

Isabel Lucas has been dating Adrien Grenier for a while now.

Lucas and the other driver were treated for minor injuries at Cedars-Sinai Medical Center in L.A., while Shia underwent surgery on his hand. The ‘Indiana Jones and the Kingdom of the Crystal Skull‘ star was also arrested on suspicion of DUI, according to a Los Angeles County Sheriff’s spokesman.