The Academy Award for Best Actress is one of the awards given to people working in the motion picture industry by the Academy of Motion Picture Arts and Sciences; nominations are made by Academy members who are actors and actresses. The winners are chosen by the Academy membership as a whole. Following the Academy's practice, the films below are listed by release year: for example, the Oscar for "Best Actress in 1999" was announced during the award ceremony held in 2000. Winners are listed first, followed by the other nominees.
The BestActress award should actually be titled "the best performance by an actress in a leading role." The same rules that govern the Best Actor category apply to the BestActress category.
Julia Roberts was nominated as BestActress for her role as a LA hooker/escort in
Siblings Warren Beatty (Best Director for Reds (1981)) and Shirley MacLaine (BestActress for Terms of Endearment (1983)) are related Oscar winners.