Kate Mara attends the De Beers flagship store opening on Madison Avenue on Wednesday, Dec. 7, 2016, in New York.

She wore a Christian Dior Spring 2017 white wool and silk crepe dress .


Kate Mara attends the De Beers flagship store opening on Madison Avenue on Wednesday, Dec. 7, 2016, in New York.
She wore a Christian Dior Spring 2017 white wool and silk crepe dress .