Best Actress winners: ordered from most to least surprising
Year Actual Winner Prob Predicted Winner Prob Ratio
2002 Nicole Kidman 0.07 Renee Zellweger 0.90 0.08
1985 Geraldine Page 0.07 Whoopi Goldberg 0.70 0.10
2011 Meryl Streep 0.08 Viola Davis 0.71 0.11
1950 Judy Holliday 0.09 Gloria Swanson 0.76 0.12
1999 Hilary Swank 0.10 Annette Bening 0.78 0.13
1952 Shirley Booth 0.11 Susan Hayward 0.84 0.13
1956 Ingrid Bergman 0.10 Deborah Kerr 0.75 0.13
1967 Katharine Hepburn 0.06 Faye Dunaway 0.43 0.14
1966 Elizabeth Taylor 0.10 Anouk Aimee 0.67 0.15
1961 Sophia Loren 0.09 Geraldine Page 0.60 0.15
1981 Katharine Hepburn 0.05 Meryl Streep 0.33 0.15
2007 Marion Cotillard 0.11 Julie Christie 0.72 0.15
1973 Glenda Jackson 0.09 Ellen Burstyn 0.58 0.16
1969 Maggie Smith 0.09 Genevieve Bujold 0.54 0.17
1946 Olivia de Havilland 0.08 Rosalind Russell 0.43 0.19
1974 Ellen Burstyn 0.07 Gena Rowlands 0.37 0.19
1945 Joan Crawford 0.16 Ingrid Bergman 0.73 0.22
1960 Elizabeth Taylor 0.08 Shirley MacLaine 0.36 0.22
1959 Simone Signoret 0.16 Elizabeth Taylor 0.67 0.24
1970 Glenda Jackson 0.16 Ali MacGraw 0.61 0.26
1988 Jodie Foster 0.16 Melanie Griffith 0.55 0.29
1947 Loretta Young 0.13 Rosalind Russell 0.39 0.33
1962 Anne Bancroft 0.21 Geraldine Page 0.62 0.34
1951 Vivien Leigh 0.13 Shelley Winters 0.35 0.37
1965 Julie Christie 0.24 Samantha Eggar 0.59 0.41
1963 Patricia Neal 0.20 Leslie Caron 0.48 0.42
1940 Ginger Rogers 0.21 Joan Fontaine 0.49 0.43
1995 Susan Sarandon 0.22 Sharon Stone 0.39 0.56
1968 Katharine Hepburn 0.20 Joanne Woodward 0.34 0.59
1980 Sissy Spacek 0.32 Mary Tyler Moore 0.54 0.59
1949 Olivia de Havilland 0.19 Jeanne Crain 0.26 0.73
1968 Barbra Streisand 0.27 Joanne Woodward 0.34 0.79
1938 Bette Davis 0.21 Wendy Hiller 0.26 0.81
1941 Joan Fontaine 0.25 Olivia de Havilland 0.25 1.00
1978 Jane Fonda 0.29 Jane Fonda 0.29 1.00
2001 Halle Berry 0.34 Halle Berry 0.34 1.00
1971 Jane Fonda 0.34 Jane Fonda 0.34 1.00
1990 Kathy Bates 0.36 Kathy Bates 0.36 1.00
1977 Diane Keaton 0.36 Diane Keaton 0.36 1.00
1972 Liza Minnelli 0.37 Liza Minnelli 0.37 1.00
1982 Meryl Streep 0.38 Meryl Streep 0.38 1.00
1987 Cher 0.39 Cher 0.39 1.00
1939 Vivien Leigh 0.39 Vivien Leigh 0.39 1.00
1991 Jodie Foster 0.45 Jodie Foster 0.45 1.00
1943 Jennifer Jones 0.45 Jennifer Jones 0.45 1.00
1964 Julia Andrews 0.46 Julia Andrews 0.46 1.00
1989 Jessica Tandy 0.47 Jessica Tandy 0.47 1.00
1984 Sally Field 0.48 Sally Field 0.48 1.00
1942 Greer Garson 0.51 Greer Garson 0.51 1.00
1983 Shirley MacLaine 0.53 Shirley MacLaine 0.53 1.00
1994 Jessica Lange 0.55 Jessica Lange 0.55 1.00
1976 Faye Dunaway 0.55 Faye Dunaway 0.55 1.00
1953 Audrey Hepburn 0.55 Audrey Hepburn 0.55 1.00
1979 Sally Field 0.61 Sally Field 0.61 1.00
1957 Joanne Woodward 0.62 Joanne Woodward 0.62 1.00
1975 Louise Fletcher 0.64 Louise Fletcher 0.64 1.00
1954 Grace Kelly 0.64 Grace Kelly 0.64 1.00
1996 Frances McDormand 0.67 Frances McDormand 0.67 1.00
1958 Susan Hayward 0.67 Susan Hayward 0.67 1.00
1948 Jane Wyman 0.67 Jane Wyman 0.67 1.00
1992 Emma Thompson 0.69 Emma Thompson 0.69 1.00
1986 Marlee Matlin 0.69 Marlee Matlin 0.69 1.00
2013 Cate Blanchett 0.69 Cate Blanchett 0.69 1.00
1993 Holly Hunter 0.75 Holly Hunter 0.75 1.00
2005 Reese Witherspoon 0.76 Reese Witherspoon 0.76 1.00
1955 Anna Magnani 0.81 Anna Magnani 0.81 1.00
1944 Ingrid Bergman 0.81 Ingrid Bergman 0.81 1.00
2012 Jennifer Lawrence 0.86 Jennifer Lawrence 0.86 1.00
2010 Natalie Portman 0.87 Natalie Portman 0.87 1.00
2003 Charlize Theron 0.87 Charlize Theron 0.87 1.00
1997 Helen Hunt 0.87 Helen Hunt 0.87 1.00
2014 Julianne Moore 0.90 Julianne Moore 0.90 1.00
2009 Sandra Bullock 0.90 Sandra Bullock 0.90 1.00
2008 Kate Winslet 0.92 Kate Winslet 0.92 1.00
1998 Gwyneth Paltrow 0.92 Gwyneth Paltrow 0.92 1.00
2004 Hilary Swank 0.93 Hilary Swank 0.93 1.00
2000 Julia Roberts 0.93 Julia Roberts 0.93 1.00
2015 Brie Larson 0.94 Brie Larson 0.94 1.00
2006 Helen Mirren 0.96 Helen Mirren 0.96 1.00