Peter Riegert is an American actor. He is best known for his roles as Donald "Boon" Schoenstein in Animal House (1978), oil company executive "Mac" MacIntyre in Local Hero (1983), pickle store owner Sam Posner in Crossing Delancey (1988) and Lt. Mitch Kellaway in The Mask (1994). He directed the short film By Courier (2000), for which he was nominated along with producer Ericka Frederick for the Academy Award for Best Live Action Short Film.

Local Hero is a 1983 Scottish comedy-drama film written and directed by Bill Forsyth and starring Peter Riegert, Peter Capaldi, Denis Lawson, Fulton Mackay and Burt Lancaster. Produced by David Puttnam, the film is about an American oil company representative who is sent to the fictional village of Ferness on the west coast of Scotland to purchase the town and surrounding property for his company. For his work on the film, Forsyth won the 1984 BAFTA Award for Best Direction.