
Michael Constantine (born Gus Efstratiou (Ευστρατίου); May 22, 1927 – August 31, 2021) was an American actor. He is most widely recognized for his portrayal of Kostas "Gus" Portokalos, the Windex bottle-toting Greek father of Toula Portokalos (Nia Vardalos), in the film My Big Fat Greek Wedding (2002).
Earlier, he 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. After the conclusion of Room 222, Constantine portrayed night court magistrate Matthew J. Sirota on the 1976 sitcom Sirota's Court, receiving his second Golden Globe nomination. Constantine reprised his role as Gus Portokalos in My Big Fat Greek Wedding 2 (2016).

The Juror
1996 · as Judge Weitzel

Thinner
1996 · as Tadzu Lempke

My Big Fat Greek Wedding
2002 · as Kostas "Gus" Portokalos

The Hustler
1961 · as Big John

My Big Fat Greek Wedding 2
2016 · as Kostas "Gus" Portokalos

Prancer
1989 · as Mr. Stewart / Santa

Voyage of the Damned
1976 · as Luis Clasing

Question of Faith
1988 · as Doctor Rudolph

The Pirate
1978 · as Yashir

Hawaii
1966 · as Mason

My Life
1993 · as Bill Ivanovich

Deadfall
1993 · as Frank

The Reivers
1969 · as Mr. Binford

Ghostbreakers
1967 · as Oscar Jensen

If It's Tuesday, This Must Be Belgium
1969 · as Jack Harmon

In the Mood
1987 · as Mr. Wisecarver

Justine
1969 · as Memlik Pasha

Pray for Death
1985 · as Mr. Newman