Mariel Hemingway is 49 years old (birthdate: November 22, 1961).
This answer is closed to changes. This is done in rare cases when questions are being vandalized or answers have become debates. E-mail reopen @ answers.com (no spaces) if you would like it to be reopened.
No, Mariel Hemingway, a granddaughter of celebrated writer Ernest Hemingway, was nominated for the Oscar for Best Supporting Actress for Manhattan (1979), but she did not win.