Sean Penn may be an Oscar-winning actor and director, but to his son Hopper Penn, he was Dad — who occasionally laid down the law. "He was strict, and I was always. Sean Penn's son Hopper has revealed how he 'butted heads for a long time' with his actor father while growing up, in a searing new interview with People Magazine.

Sean Penns Son
The former couple welcomed their son, Hopper Jack Penn, on Aug. 6, 1993. While Hopper is already a pretty uncommon name, he almost had an even more unlikely moniker.