Michael Constantine (born Gus Efstratiou (Ευστρατίου)) was an American actor. He is most widely recognized for his portrayal Kostas "Gus" Portokalos, the stubborn Greek father of Toula Portokalos (Nia Vardalos), in the film My Big Fat Greek Wedding (2002). For his performance, Constantine won a Satellite Award for Best Supporting Actor – Musical or Comedy.
Early in his career, Constantine earned acclaim for his television work, especially as the long-suffering high school principal, Seymour Kaufman, on ABC's comedy-drama, Room 222, for which he won the Primetime Emmy Award for Outstanding Supporting Actor in a Comedy Series in 1970; he was again recognized by the Emmy Awards, as well as the Golden Globe Awards, the following year.
