Lex is the name of the Jurassic Park Girl, a character from the 1993 movie of the same name. She is the daughter of the park's creator, John Hammond, and is portrayed by Ariana Richards. Lex is a brave and resourceful young girl who helps the park's staff in their efforts to contain the dinosaurs and protect the visitors. She is also a computer expert, able to hack into the park's security systems and disable the electric fences.