Two-time Oscar-winner Jodie Foster was in Sommersby(1993) which was based on the 1982 French film The Return of Martin Guerre. I'm sure there are others.
Gwyneth Paltrow for best actress.
Susan Hayward won the Oscar for Best Actress for I Want to Live! (1958).
The winner of the 2007 Oscar for Best Supporting Actress was Jennifer Hudson for Dreamgirls (2006).
Kate Winslet won the 2008 Best Actress Oscar for her performance in "The Reader."
Ghost
The only actor to win an Oscar for playing a real-life Oscar winner is Cate Blanchett. She won a Best Supporting Actress Oscar in 2004 for playing Katharine Hepburn in The Aviator.Robert Downey, Jr. is the only other actor nominated for playing a previous nominee, Charlie Chaplin, in Chaplin.Maggie Smith won an Oscar as supporting actress for portraying a fictional actress in The California Suite (1978). In the movie she gets ready for the ceremony, and returns to the hotel afterwards, without the award.
Susan Sarandon.
The name of the actress who performs the main role in the movie The Others, directed by Alejandro Amenabar in 2001, was the Oscar winner Nicole Kidman.
Two-time winner out of five nominations: 1939 Best Supporting Actress, Gone with the Wind 1941 Best Actress, Hold Back the Dawn 1946 winner Best Actress, To Each His Own 1948 Best Actress, The Snake Pit 1949 winner Best Actress, The Heiress
The two-time Oscar winner was married to actress Cythia Boyd Stone from 1950 to 1956 and to actress Felecia Farr from 1962 until his death in 2001.
21-year-old Marlee Matlin for Children of a Lesser God(1986), who is also the youngest Oscar winner for Best Actress.
I'm not sure how tall Tatum O'Neal and Anna Paquin were when they won the Oscar for Best Supporting Actress. Best Suporting Actress winner Linda Hunt is only 4' 9" (1.45 m). She might be the shortest.