She was born in New York City, the eldest daughter of Mr. Howard Oxenberg (a manager and businessman, and a close friend of the Kennedy family) and of his first wife H.R.H. Princess Elizabeth of Yugoslavia. Her grandmother was Princess Olga of Greece and Denmark, a legendary beauty and the sister of Princess Marina, who married the Duke of Kent (uncle of Queen Elizabeth II of the United Kingdom), and also a first cousin of the Duke of Edinburgh (husband of Queen Elizabeth II).
She married firstly Robert Evans, in Beverly Hills, California on July 12, 1998, but the marriage was annulled in July 1998. She then married in Las Vegas on May 8, 1999, the actor Casper Van Dien who had divorced the granddaughter of the late actor Robert Mitchum.