Kristen Stewart look like Princess Diana, but can she walk like her? Can she talk like her? Can she capture the essence of the people's princess? The first trailer for is here, officially unveiling Stewart's portrayal of Princess Di.The biopic — which takes its title from Diana's maiden name — unfolds over three days, as the royal family celebrates Christmas at the Queen's Sandringham Estate and the Princess of Wales makes the decision to end her marriage with Prince Charles ('s Jack