Knightley stars at Duchess launch :

Actress Keira Knightley has graced the red carpet in London's Leicester Square for the world premiere of her latest costume drama The Duchess.
Wearing a shoulderless cornflower blue dress, the 23-year-old was greeted by screams and camera flashes.
In the film, she plays Georgiana Spencer, an 18th Century noblewoman who embarks on a loveless marriage.
Knightley said she was pleased by the positive reviews: "It's much better than people saying you're awful."
"It was a very exciting character to play," she added.
"I think she was an incredible woman and the fact that the film's getting good reviews is obviously really exciting."
Asked whether she had had reservations about signing up for another period drama, Knightley said: "No, not really."
"I think you've just got to go with the script and whether the character's interesting," she told BBC entertainment correspondent Lizo Mzimba.