The Australian actress who was a passenger in Shia LaBeouf's truck when he crashed in Hollywood at the end of last month has split from boyfriend Adrien Grenier, according to new reports.Isabel Lucas found love with the Entourage star as the couple followed a love of environmental activism, but when she attended an eco event in Hollywood solo recently, gossips suggested the romance was over.Grenier was then photographed having fun in Malibu, California with a mystery girl on Sunday and now the Sydney Daily Telegraph reports the stars have split.Management and aides for the Australian actress had no comment.