Pippa Middleton may be a professional party planner, but the Celebrate author let someone else oversee celebrity chef Jamie Oliver's Instagram bash at Fifteen in London on Monday, Sept. 16. The Duchess of Cambridge's 30-year-old sister paired a French Connection blazer with a pink sweater and black mini-skirt for the occasion. While there, she noshed on a selection of canapés and chatted up Oliver, 38.
Other guests included musicians Boy George, Ashley Roberts, Ronnie Wood and Eliza Dootlittle. Oliver described the soiree as "fantastic" and "great" in an Instagram caption. "Thank you to all the guys who we invited that came," he added. "It was such a pleasure to meet you all." Middleton's boyfriend, Nico Jackson, appeared to be M.I.A.