The Best Actress race is stuffed with contenders this year.
Emma Stone, La La Land
Natalie Portman, Jackie
Ruth Negga, Loving
Amy Adams, Arrival
Annette Bening, 20th Century Women
Meryl Streep, Florence Foster Jenkins 
Kate Beckinsale, Love & Friendship

Because there can be only five, studios often submit their actress or actor for supporting , where they know they have a better chance. Viola Davis is now officially running in the Best Supporting Actress category for the 2017 SAG Awards for her role in Fences. With Davis out of the Best Actress race, we are looking at a showdown between Emma Stone and Natalie Portman for Best Actress. 

Davis will have some competition of her own in the Supporting category.

Michelle Williams, Manchester By The Sea
Lupita Nyong’o, Queen of Katwe 
Nicole Kidman, Lion
Greta Gerwig, 20th Century Women

Fences has not been seen yet. Based on her performance in the stage version, Davis is a lock for a SAG and Oscar nomination.