O
1973 Tatum O'Neal - Paper Moon
1940 Barbara O'Neil - All This, and Heaven Too
2004 Sophie Okonedo - Hotel Rwanda
1989 Lena Olin - Enemies, a Love Story
1939 Edna May Oliver - Drums Along the Mohawk
1950 Nancy Olson - Sunset Boulevard
1936 Maria Ouspenskaya - Dodsworth
1939 Maria Ouspenskaya - Love Affair
Read more about this topic: List Of Nominees For The Academy Award For Best Supporting Actress (by Actress)