Jessica "Jessie" Lauren Graff (born January 12, 1984) is a professional stunt woman and athletics-based television personality. Her nickname is "Tumbleweed". She is a black belt in Taekwondo, a black sash in Kung Fu, and is trained in five other styles of martial arts. She is also a championship pole vaulter and competitive gymnast. She has become well known for her athletic achievements on the obstacle course show American Ninja Warrior, including in 2016 becoming the first woman ever to complete Stage One of the Las Vegas Finals course and only the second woman to conquer the Stage 1 of the Sasuke franchise worldwide, after Chie Tanabe in SASUKE 2.