Gregory Gerald Antonacci (February 2, 1947 - September 20, 2017) was an American television actor, director, producer, and writer. He is best known for portraying Johnny Torrio in Boardwalk Empire in every season, from 2010 to 2014, and as Phil Leotardo's right-hand man Butch DeConcini in The Sopranos from 2006 to the season finale in 2007.