Plum Sykes was born in London, one of six kids, and has a twin sister Lucy. She graduated from Worcester College, Oxford with a degree in modern history. Sykes began her career in fashion by working as a fashion assistant at British Vogue. She then moved on to be a contributing editor on fashion for American Vogue after moving to New York.
Plum Sykes love for fashion helped develop her first novel, Bergdorf Blondes, which focuses on New York socialites living their couture lives. Blondes quickly hit the bestseller lists, and paved way for Sykes second novel, Debutante Divorcee. Sykes is married to British entrepreneur Toby Rowland and they have a daughter together, Ursula.