Lex Murphy is John Hammond’s granddaughter, whom he brings to the park along with her brother, Tim. Seven or eight years old, Lex is athletic and energetic. She speaks her mind and whines when she doesn’t get her way. When the tyrannosaurus attacks her and the others in the ride vehicles, she panics and temporarily reverts to a more child-like state, calling the creature “aminals” instead of “animals.” Dr. Alan Grant rescues her and Tim from that situation and keeps them safe as they travel back to the visitor center. Although she bickers with and teases her brother, she follows his lead when necessary.