Tilda Swinton Wins National Board of Review's Best Actress!

Tilda Swinton gets her nails done during Art Basel Miami Beach 2011 on Friday (December 2) at the Standard Hotel in Miami Beach, Fla.

Her nails were designed by artist Dzine at the Imperial Nail Salon Presented by Perrier.

PHOTOS: Check out the latest pics of Tilda Swinton

It was just announced that the 51-year-old actress won the Best Actress prize from the National Board of Review for her work in the film We Need to Talk About Kevin!

The film, which will hit theaters on January 27, is about the mother (Swinton) of a teenage boy (Ezra Miller) who went on a high-school killing spree trying to deal with her grief – and feelings of responsibility for her child’s actions.

FYI: Tilda also just picked up the Best Actress prize at the European Film Awards! Congrats!