Stephen Furst, who played naive fraternity pledge Flounder in the hit movie Animal House, has died of complications from diabetes.
Furst, 63, died on Friday at his home in Moorpark, California, north of Los Angeles, his son Nathan said.
Furst played Kent "Flounder" Dorfman in the 1978 film that also starred John Belushi.
It was Belushi's character, Blutarsky, who drew Flounder into a prank that went terribly wrong and ended up with the frantic Flounder shooting a horse.
Furst's long list of credits included the 1980s medical drama St Elsewhere, in which he played Dr Elliot Axelrod.
He played Vir Coto and was an occasional director on the 1990s sci-fi series Babylon 5 and also voiced characters on projects including TV's Buzz Lightyear Of Star Command and the video The Little Mermaid 2: Return To The Sea.
"He was proudest of his family and he felt blessed and incredibly privileged to have the career that he had and enjoyed," Nathan Furst said.
Furst was also a director and producer, working with his other son Griff.
Their Curmudgeon Film projects included the movies My Sister's Keeper and Cold Moon, a suspense thriller to be released in October.
Along with his sons, Furst leaves a wife, Lorraine, and two grandchildren.