Kiki Preston, née Alice Gwynne (1898 – December 23, 1946), was an American socialite, a member of the Happy Valley set, and the alleged mother of a child born out of wedlock with Prince George, Duke of Kent, fourth son of King George V.
Known for her drug addiction, which earned her the nickname "the girl with the silver syringe", she was a fixture of the Paris and New York high social circles, and a relation to the powerful Vanderbilt and Whitney families.
Her life was marred by several tragic losses and her own mental problems, which eventually led to her suicide at 48.