He died on Thursday, his talent agency Gersh told variety.com. He was 92.
Sargent won adapted screenplay Oscars for Julia?in 1978 and Ordinary People?in 1981 and was also nominated in the category in 1974 for Paper Moon.
The writer worked with many of Hollywood's top directors, including Alan J. Pakula, John Frankenheimer, Paul Newman, Peter Bogdanovich, Sydney Pollack, Fred Zinnemann, Robert Redford, Martin Ritt, Norman Jewison, Stephen Frears and Wayne Wang.
Sargent started as a writer for television but broke into features with his screenplay for 1966's Gambit, a comedy thriller starring Michael Caine, Shirley MacLaine and Herbert Lom.
Sargent did uncredited work on the 1976 remake of A Star Is Born?that starred Barbra Streisand and Kris Kristofferson.
Sargent, born Alvin Supowitz in Philadelphia, began his Hollywood career with