Jeffrey Nero Hardy is an American professional wrestler and musician. He is currently signed to Total Nonstop Action Wrestling (TNA), where he is a former three-time TNA World Heavyweight Champion and a former two-time TNA World Tag Team Champion. He is best known for his tenures in WWE and All Elite Wrestling (AEW). Together with his brother Matt Hardy, the tag team The Hardy Boyz are widely regarded as one of the major teams that revived tag team wrestling during the Attitude Era and one of the greatest tag teams in professional wrestling history.

Jeff Nero Hardy is the son of Gilbert and Ruby Moore Hardy, and the younger brother of Matt Hardy. Their mother died of brain cancer in 1987, when Jeff Hardy was nine. He developed an interest in motocross at age 12 and got his first bike, a Yamaha YZ-80. He had his first race when he was in the ninth grade. Hardy played baseball when he was young, but had to stop after he crashed during a motocross race, injuring his arm. He also played football during high school as a fullback and linebacker. He briefly competed in amateur wrestling in high school. He had to stop playing football in high school, after he was ordered to pick between professional wrestling and football, and he chose wrestling. Hardy's favorite subjects in school were U.S. history and art, which he did for extra credit.