News Princess Diana's Niece Lady Kitty Spencer Is All Grown Up–and Stunning in Sparkly Jumpsuits By Jonathan Borge Jonathan Borge Instagram Twitter Jonathan Borge is a writer and editor living in New York City. His writing has appeared in Glamour, Refinery29, Forbes, and PAPER, among other publications. Plus, he's held staff positions at Marie Claire, InStyle, and OprahDaily.com. Currently, he's the Senior Entertainment Editor at Bustle Digital Group's Elite Daily, where he oversees digital covers, features and profiles, freelance essays, and strategy for the site's TV/Movies and Celebrity and Music sub-verticals.He primarily writes about pop culture and style, and has a passion for telling LGBTQ+ and Latinx stories. When he's not working, he's likely waiting for Lady Gaga to announce her next tour. InStyle's editorial guidelines Updated on November 21, 2017 @ 02:30PM Pin Share Tweet Email Never heard of Lady Kitty Spencer? The 26-year-old is the eldest daughter of the late Princess Diana's brother Charles Spencer and his first wife Victoria Lockwood. She's basically royalty, and on Monday in London, the socialite headed to the Walpole British Luxury Awards 2017 in a look that proved she's all grown up. For the occasion, Spencer turned to Kate Middleton-loved brand Temperley London for a dazzling and sparkly mermaid-like jumpsuit that featured a floral-like design around the bust. She paired the look with a rectangular clutch and black pointed-toe shoes, and managed to deliver an uncanny resemblance to the late Princess Diana. David M. Benett/Getty Images Spencer is an ambassador and trustee for the Give Us Time and Centrepoint charities in the U.K., and is a graduate of Regents University. On Instagram, she regularly shares photographs and videos of her charmed life. Fabulous, indeed.