Letty was presumably born and raised in the same neighborhood as the Toretto family. She lived down the street from them. Letty took an interest in cars when she was ten years old. Dominic Toretto, a fellow car enthusiastic like his father, "always had her attention". However, when she became sixteen, Dominic became romantically interested in her.
Although Letty expresses some concern about Dominic's carjacking scheme, she participates in every robbery. She is seen at Race Wars where she races and beats a fellow racer. In the end, during a botched highway robbery, she rolls her car and is injured but is saved by Dom and survives.