Joseph Mascolo is an actor, best known as Stefano DiMera on NBC's Days of Our Lives, winner of two Favorite Villain Awards by Soap Opera Digest. Other television credits include Massimo Marone IV on CBS' The Bold and the Beautiful, ABC's Nicholas Van Buren on General Hospital, Carlo Alvarez on NBC's Santa Barbara, and his Emmy nominated role as Papa on NBC Special Treat's Papa and Me.

Film credits include Sharky's Machine, Gangster Wars, Spook Who Sat by the Door, and Shaft’s Big Score.

Broadway credits include his debut as Boy/Kazar in Night Life (Brooks Atkinson Theatre); Phil Romano in That Championship Season (Booth Theatre); Colonel Alcibiade Zbyre in Murderous Angels (Playhouse Theatre); Policeman in The Good Woman of Setzuan, Blick in The Time of Your Life, Officer/Gutman in Camino Real, and Colonel Warmer in Operation Sidewinder (Vivian Beaumont Theatre); and Ricci in Dinner at Eight (Alvin Theatre).