Polfoto 30-06-2005 Luxembourg's Princess Sibilla casts her vote at a polling station in Luxembourg, Sunday July 10, 2005. Voters in the Grand Duchy of Luxembourg cast ballots Sunday on the embattled European Union constitution, a treaty that many in the 25-nation bloc say is already dead. Prime Minister Jean-Claude Juncker has said he will resign if his country rejects the constitution. (AP Photo/Geert Vanden Wijngaert)
Born at Betzdorf Castle on 1 May 1963, Prince Guillaume is the youngest of the five children of Their Royal Highnesses Grand Duke Jean and Grand Duchess Joséphine- Charlotte of Luxembourg.
He attended secondary school in Luxembourg and Switzerland and obtained his baccalaureate in Grenoble in 1982. He continued his studies at Oxford University in the United Kingdom and at Georgetown University in
Washington, where he graduated in 1987.
He gained six months work experience at the International Monetary Fund in
Washington, and spent two years at the Commission of the European Communities in Brussels.
In 1992, he became President of Lux- Development, an agency responsible for carrying out the Luxembourg Governments bilateral and intergovernmental development aid programme.
Furthermore, he is President of the Mérite Jeunesse Foundation. He married
Sibilla Weiller on 8 September 1994, who has since borne the title of Princess of Luxembourg.
Four children were born of this marriage:
- Prince Paul-Louis (b. 24 March 1998)
- Prince Léopold and Princess Charlotte (b. 2 May 2000)
- Prince Jean (b 2004)
Text and image from a pdf file about the Grand Ducal family.