Whilst American publications raved about the opening of Sienna Miller's much-hyped role as Warhol's society sidekick Edie Sedgwick in the film "Factory Girl," her appearance at yesterday New York screening had the British fashion press cringing at her outfit.

After the film's debut at the Zeigfeld theatre, Sienna made her way to the after party wearing a heavy black jumper with what resembled a pair of black knickers and tights. One publication even reported: "Sack the stylist" as Sienna had forgotten her skirt.