Joseph Peter Mascolo was an American musician and dramatic actor. During his long career, he acted in numerous motion pictures and television series. He played villain Stefano DiMera on NBC's soap opera Days of Our Lives from 1982 to 2016. He also starred as Massimo Marone on the CBS' soap opera The Bold and the Beautiful from 2001 to 2006.

Stefano DiMera is a fictional character from the NBC soap opera Days of Our Lives, played by Joseph Mascolo. Created by Pat Falken Smith, Stefano was introduced on January 18, 1982 as the father of Tony DiMera looking to expand his criminal empire to Salem. Stefano's early storylines included his feud with Roman Brady, playing his children – Tony and Renée DuMonde against one another when he is presumed dead, orchestrating a series of murders with his son and Tony's deranged look-a-like André, and replacing the presumed dead Roman with the brainwashed John Black.