Estregan made his film debut in 1963 with Jose Nazareno, ang Taxi Driver.
[3] He was often cast as a villain and was infamously known as the "Penetration King" of erotic Philippine cinema.
He also received a nomination from the Gawad Urian as Best Actor for Hostage: Hanapin si Batuigas (1977).
[1] His older brother is former Philippine President and former Manila Mayor, Joseph Estrada.
He was also the father of actor Gary Jason Ejercito ("Gary Estrada") and Philippine Basketball Association player Rain or Shine Elasto Painters Gherome Eric Ejercito out of wedlock.