Will McCormack (born 1974) is an American television and film actor. McCormack, who graduated Trinity College in Hartford, Connecticut, is the younger brother of actress Mary McCormack, who stars in the hit USA TV series In Plain Sight. His key television roles include Jason La Penna on The Sopranos (1999–2001). Most recently, he played the role of Leo, brother of lead character Lucy Spiller (Courteney Cox), in the FX series Dirt. He also plays a recurring role as the FBI agent in sister Mary's TV drama In Plain Sight.