Pippa Middleton (full name Philippa Charlotte Middleton), born on September 6, 1983, in Berkshire, England, is a British socialite, author, and columnist. She is the younger sister of Catherine, Duchess of Cambridge (Kate Middleton), and gained global fame as the maid of honor at the 2011 royal wedding. Known for her poise and fashion sense, she authored the party-planning book 'Celebrate: A Year of Festivities for Families and Friends' and wrote columns for magazines like The Spectator. She married financier James Matthews and has children, engaging in charity and social events.