The Harper's Bazaar UK Women of the Year Awards celebrate accomplishments in the arts, philanthropy, and fashion, so it was no surprise that guests at Tuesday evening's awards were immaculately dressed in a whole host of formal looks, many of them from British designers. The ladies of Downton Abbey led the charge, with breakthrough award winner Lily James wearing romantic Erdem and television icon winner Michelle Dockery resplendent in a couture jumpsuit by Ralph & Russo.
Elsewhere, Kate Winslet, Nicole Kidman, and best actress winner Sienna Miller added some Hollywood glamour. Read on to see the most glamorous looks from the evening in our gallery.