Between marriages he had two sons by actress Debra Berger (March 17, 1957 –), daughter of William Berger's first marriage:
Tao dei Principi Ruspoli (Bangkok, November 7, 1975 –), married in Washington, Rappahannock County, Virginia, June 7, 2003 actress Olivia Wilde (New York City, New York, March 10, 1984 –)
Bartolomeo dei Principi Ruspoli (Rome, October 6, 1978 –), who appeared as himself in his brother's film Just Say Know (2002), married in November, 2004 Aileen Getty (July 14, 1957 –), daughter of John Paul Getty, Jr. and first wife Abigail "Gail" Harris, aunt of Balthazar Getty and formerly married with issue to Christopher Edward Wilding (New Westminster, Metro Vancouver, British Columbia, February 2, 1955 –), son of Michael Wilding and Elizabeth Taylor, without issue.