Born the youngest of three boys, Watt was raised by his parents, Connie and John Watt, in Pewaukee, Wisconsin. His father was a firefighter for 25 years and his mother is the vice president of an independent inspections company. His two older brothers, J. J. and Derek, both played at Wisconsin. Derek is a fullback for the Pittsburgh Steelers and was selected in the sixth round by the then-San Diego Chargers with the 198th overall pick in the 2016 NFL Draft, before signing with the Steelers in 2020. J. J. is a former three-time NFL Defensive Player of the Year and five-time All-Pro defensive end who was selected by the Houston Texans with the 11th overall pick in the 2011 NFL Draft. T. J. was teammates with Derek at Wisconsin from 2012 to 2015. During his time at Wisconsin, Watt majored in retailing and consumer behavior.
