Sienna Miller and Anne Hathaway both looked absolutely stunning as they walked the red carpet for the 2nd anniversary party of British fashion label Marchesa in NYC. Sienna played host at the event wearing the label's creation, and Anne looked stunning proving she doesn't need her Devil's wardrobe to look fabulous.

Sienna, who stars in the upcoming Factory Girl, was invited to host the Bergdorf Goodman bash by Marchesa design duo Georgina Chapman and Keren Craig. And the 24-year-old style icon was, naturally, sporting one of the label's creations when she turned up at the star-studded event.

Launched in 2004, Marchesa is the hot label du jour for red carpet affairs on both sides of the Atlantic, also including Felicity Huffman, Penelope Cruz, Mischa Barton and Scarlett Johannson among its high-profile fans.

Like Sienna, Salman Rushdie's statuesque wife Padma Lakshmi was showing off her pins in an elegant cocktail number, whileThe Devil Wears Pradastar Anne, who admits to being something of a tomboy as a little girl, delivered full-on silver screen glamour in figure-hugging scarlet gown.