Peter Riegert (born April 11, 1947 in New York City) is perhaps best known for his portrayal of Donald Schoenstein (aka Boon) in 1978's National Lampoon's Animal House and as Sam Posner in the 1988 film, Crossing Delancey.

He also played Cpl. Igor Straminsky in the episodes "Change Day" and "War of Nerves" on the television series M*A*S*H, Mac MacIntyre in the 1983 film Local Hero, and Lt. Mitch Kellaway in the 1994 film The Mask.

He also plays crooked New Jersey State Assemblyman Ronald Zellman on the hit HBO series, The Sopranos.

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1947 births | American actors | Film actors | Law & Order actors | Law & Order: Special Victims Unit actors | Living people | M*A*S*H actors | People from New York | Television actors | The Twilight Zone actors