Thirteen is a 2003 movie written by the then fifteen year old Nikki Reed. The movie is intended to be partially autobiographical as it shows much of what Nikki's life was like between the ages of twelve and thirteen. The movie deals with the experience of girls just barely out of their pre-teens and getting into situations that would be better handled by adults. It was produced independently and only picked up by Working Title Films only after the movie had finished production. Not to be confused with Thirteen: The Musical.