<Li> Portrayed by: Ariana Richards </Li> <P> Alexis (Lex) Murphy is Tim Murphy's sister and John Hammond's granddaughter . </P> <P> In the novel, she is described as a seven - or eight - year - old girl, relatively outgoing, blonde and "a sporty young girl who loves baseball ." She wears a baseball glove slung over her shoulder and a baseball cap just about everywhere . Lex is shown to have the traits of a stereotypical child that whines and complains . Her selfish and childish behavior often annoys the people around her and puts her and the group in danger . Throughout the novel, she shows characteristics of her grandfather, John Hammond, such as being unkind, careless, and unappreciative of the events occurring around her . </P> <P> In Spielberg's 1993 film, Lex is the elder of the two siblings at the age of 12 - 14 and has a different personality, similar to that of her brother's from the novel . In the film, Lex has advanced computer skills, being a "computer geek", according to Tim, that help the survivors escape a pack of Velociraptors . While initially frightened by many of the dinosaurs, Lex eventually gains maturity and courage and is instrumental in rebooting the park's systems . Much like the character of Dr. Ellie Sattler, Lex's character is strengthened to add strong female roles to the film . </P>

How did john hammond started his career in jurassic park