Guillaume, Hereditary Grand Duke of Luxembourg

heir apparent to the crown of Luxembourg

Prince Guillaume, Hereditary Grand Duke of Luxembourg (Guillaume Jean Joseph Marie; born 11 November 1981), is the heir apparent to the crown of Luxembourg since his father's became grand duke in 2000.

Prince Guillaume
Hereditary Grand Duke of Luxembourg (more)
Guillaume av Luxemburg.jpg
The Hereditary Grand Duke in 2013
Born (1981-11-11) 11 November 1981 (age 41)
Grand Duchess Charlotte Maternity Hospital, Luxembourg City, Luxembourg
IssuePrince Charles
Full name
Guillaume Jean Joseph Marie
HouseNassau-Weilburg (official)
Bourbon-Parma (agnatic)
FatherHenri, Grand Duke of Luxembourg
MotherMaría Teresa Mestre y Batista
ReligionRoman Catholicism

His style and title in full is: His Royal Highness Prince Guillaume Jean Joseph Marie, Hereditary Grand Duke of Luxembourg, Hereditary Prince of Nassau, Prince of Bourbon-Parma.[1]

On 26 April 2012, the court announced the engagement of the Hereditary Grand Duke to the Belgian Countess Stéphanie de Lannoy.[2] They were married on 19 October 2012.[3]

Guillaume and Stéphanie have a son, named Prince Charles, born on 10 May 2020.[4]


  1. Actualités: S.A.R le Prince Guillaume devient le Grand-Duc Héritier Archived 25 December 2015 at the Wayback Machine – Official website of the Luxembourg Government
  2. "Guillaume et Stéphanie se financent demain". Luxemburger Wort. 27 April 2012. Retrieved 26 April 2012.
  3. Nikkhah, Roya (20 October 2012). "Luxembourg's royal wedding draws regal guest list". The Telegraph.
  4. "BREAKING: Hereditary Grand Duchess of Luxembourg gives birth to her first child – a son". Royal Central. 2020-05-10. Retrieved 2020-05-10.