Born on 14 August 1968 at Fischbach Castle, Fischbach, Luxembourg, he is the second child and only son of Prince Charles of Luxembourg, second son of Charlotte, Grand Duchess of Luxembourg, and Prince Felix of Bourbon-Parma, and his American-born wife, Joan Douglas Dillon, second daughter of politician and diplomat C. Douglas Dillon.
Prince Robert and his sister were raised at Fischbach Castle, which was then the home of his paternal grandparents.
[1] On 29 January 1994, Prince Robert married Julie Elizabeth Houston Ongaro (born 9 June 1966) in Boston, Massachusetts.
[4] In 1992, Prince Robert and his future wife wrote a screenplay based on Don Juan.
[10][1][5] In 2018, Prince Robert and Domaine Clarence Dillon joined the Primum Familiae Vini, an association of family-owned wineries with membership limited to twelve families.