Anthony Sawyer Horton Jr. (born July 2, 1958), known professionally as Tony Horton, is an American personal trainer, author, and former actor. He is best known as the creator of the commercial home exercise regimen P90X.
Tony Horton was one of three children born in Westerly, Rhode Island to Anthony Sawyer Horton (Sr.) and Jean (née Gencarelli) Horton, and was raised in Trumbull, Connecticut. He has two sisters. His family is Roman Catholic. He was a self-described "98-pound weakling" with a speech impediment.
By the time he was 10 years old, his family had moved more than five times. His father served three years in the Army as a 1st Lieutenant, and the family was stationed at various bases around the U.S. His father was a minor league baseball player, golfer and yachter. Tony Horton became interested in fitness when he took a weightlifting class while attending the University of Rhode Island and was a member of Phi Kappa Psi. After graduation, he moved to Southern California and worked various jobs, including as a stand-up comedian and gofer for 20th Century Fox.