With films like “Atonement” and “Pride and Prejudice” on her resume, it’s clear that Keira Knightley loves period pieces. And last night she was hamming it up at New York City’s Public Theatre for the premiere of her latest historical film “The Duchess.”

The “Pirates of the Caribbean” babe looked elegant as she made her way down the red carpet sporting a black Chanel Haute Couture dress with leaf accents teamed with a pair of black peep-toe heels.

And Keira wasn’t the only hottie in the house- she was accompanied by her hunky co-star Dominic Cooper, as well as Anna Wintour, the editor-in-chief for Vogue magazine.

Though there were a lucky few who got to see “The Duchess” last night, the rest of us will have to wait until September 19th when it opens in limited release.

Gossip Girls

Enjoy the pictures of Keira Knightley at the NYC premiere of "The Duchess" (September 10).