While her royal sister, Duchess Kate, was dressed in knee-high boots, tights and a slim-fitting black dress while visiting the National Portrait Gallery in London on Wednesday, Pippa Middleton sported a lighter, breezier look across town.

The 28-year-old stepped out in London's stylish Chelsea neighborhodd, clad in a nude Pennys Party Silk Dress by French Connection, which she paired with a tan jacket by Whistles during the cool, crisp morning. Retailing for $248 on, the luxe, 100-percent silk mini features a scoop neck and is adorned with tiers of chic ruffles.

Whether it's worn under a cropped blazer or with opaque black tights and short booties, the sleeveless style is well-worth the price as it transitions well for fall.