Michelle Dockery

Actress Michelle Dockery attends the Masterpiece Classic "Downtown Abbey, Season 3" panel during the PBS portion of the 2012 Summer TCA Tour on July 23, 2012, in Beverly Hills, Calif. She has been nominated for an Emmy for her work in the show.

Dan Stevens as Matthew Crawley, left, and Michelle Dockery as Lady Mary are shown in a scene from the second season on "Downton Abbey."

Carnival Film & Television Limited 2012 for Masterpiece

A promotional photo for the third season of "Downton Abbey."

Michelle Dockery attends the "Schiaparelli And Prada: Impossible Conversations" Costume Institute Gala at the Metropolitan Museum of Art on May 7, 2012, in New York.

"Downton Abbey" cast members, from left, Elizabeth McGovern, Joanne Froggatt and Michelle Dockery pose for a photograph backstage at the 63rd Primetime Emmy Awards on Sunday, Sept. 18, 2011, in Los Angeles. "Downton Abbey" won for outstanding writing and outstanding miniseries or movie.

Actors Dan Stevens, left, and Michelle Dockery speak during the "Masterpiece - Downtown Abbey II" panel during the PBS portion of the 2011 Summer TCA Tour held at the Beverly Hilton Hotel on July 31, 2011, in Beverly Hills, Calif.

Gareth Cattermole/Getty Images for Jameson

Michelle Dockery attends the Jameson Empire Awards at the Grosvenor House Hotel on March 27, 2011, in London.

Actress Michelle Dockery attends the South Bank Sky Arts Awards at The Dorchester on Jan. 25, 2011, in London.