Masterson was born on Long Island, New York, the son of Carol Masterson, a manager, and Peter Masterson, an insurance agent. Masterson, like his brother
Danny Masterson, is a follower of
Scientology. The two have invested in restaurants together. He also has a half-sister, actress
Alanna Masterson, and a half-brother, actor
Jordan Masterson. Masterson was in a relationship with
Laura Prepon from 1999 to 2007, a co-star of ''That '70s Show'' alongside his brother. On June 25, 2019, Masterson married actress Yolanda Pecoraro. In April 2021, she gave birth to their daughter. == Filmography ==