From channel4.com:

Stephanie West talked to Keira Knightly about her new film, The Duchess, in which she plays Georgiana Spencer, an ancestor of Princess Diana.

Keira Knightley spoke of the “extraordinary character” of The Duchess, describing her as “a woman who is incredibly intelligent and loving of life and an idealist at the beginning of the film.”

“She’s someone who tries to grab happiness with both hands, and every single time sort of gets ripped away from it,” she says.