Guillaume V, Grand Duke of Luxembourg

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Guillaume V
Trounwiessel 2025 EP (115) (cropped).jpg
Guillaume in 2025
Grand Duke of Luxembourg
Reign3 October 2025 – present
Enthronement 3 October 2025
Predecessor Henri
Heir apparent Charles
Regent of Luxembourg
Regency8 October 2024 – 3 October 2025
MonarchHenri
Born (1981-11-11) 11 November 1981 (age 43)
Grand Duchess Charlotte Maternity Hospital, Luxembourg City, Luxembourg
Spouse
(m. 2012)
Issue Prince Charles
Prince François
Names
Guillaume Jean Joseph Marie de Nassau
House Luxembourg-Nassau (official) [1]
Bourbon-Parma (agnatic)
Father Henri, Grand Duke of Luxembourg
Mother María Teresa Mestre y Batista
Alma mater University College, Durham
Brunel University of London

University of Angers
Military career
AllegianceLuxembourg
Branch
Years of active service2002–2025
RankColonel

Guillaume V [2] (Guillaume Jean Joseph Marie de Nassau; born 11 November 1981) is Grand Duke of Luxembourg, reigning since 3 October 2025. The eldest son of Grand Duke Henri and Grand Duchess Maria Teresa, he acceded to the throne upon the abdication of his father.

Early life and education

Guillaume was born on 11 November 1981 at the Grand Duchess Charlotte Maternity Hospital in Luxembourg City as the eldest child of Grand Duke Henri of Luxembourg and his wife, Cuban-born Grand Duchess Maria Teresa. [3] His godparents are Princess Marie Astrid of Luxembourg and Prince Guillaume of Luxembourg. Guillaume has four younger siblings: Prince Félix, Prince Louis, Princess Alexandra and Prince Sébastien.

Guillaume attended public school, completing his primary education in Lorentzweiler and his secondary education at the Lycée Robert-Schuman in Luxembourg City, [4] [5] before attending Swiss boarding schools the Institut Le Rosey and the Collège Alpin International Beau Soleil where he finished the French baccalaureate in 2001; [4] and Royal Military Academy Sandhurst, Camberley, England. [4] He began his higher education studies in the United Kingdom where he studied at University College, Durham and Brunel University, both in England. [6] In 2006 he entered Institut Philanthropos in Fribourg, Switzerland, where he spent a year studying philosophy and anthropology. He later studied letters and political science at the Institut Albert-le-Grand in Angers, receiving his bachelor's degree with honors in 2009. His degree was issued by Université d'Angers, [4] as a result of a partnership agreement between the two schools. From 2018 until 2019, Prince Guillaume attended a postgraduate training at the Royal College of Defence Studies (RCDS) in London. [3]

The then-Hereditary Grand Duke completed internships at the Belgian Chemical Union in 2003, at the Deutsche Bank in London in 2004, and at the Spanish branch of ArcelorMittal in 2005. [3] Sworn in December 2002 as an officer in the Luxembourg Army, Guillaume held the rank of colonel until his accession to the throne, upon which he was promoted to General and Commander of the Army. [3]

Hereditary Grand Duke

Guillaume as Hereditary Grand Duke in 2013 Guillaume av Luxemburg.jpg
Guillaume as Hereditary Grand Duke in 2013

Guillaume was heir apparent to the crown of Luxembourg from his father's accession in 2000 until 2025, when he became Grand Duke following Henri's abdication.

Guillaume became the honorary chairman of the Board of Economic Development of the Grand Duchy of Luxembourg, an agency for economic promotion and development, in March 2001. [7] [3] He has also been a member of the Council of State since 24 June 2005. [7] He attended the Millennium Conference at the United Nations headquarters in New York City in 2005. [3] Guillaume also worked at the European Commission and the Permanent Representation of Luxembourg to the European Union in Brussels in 2012. [3]

Guillaume is patron of the Luxembourg Cycling Sport Federation, Youth Hostels Central, National Association of Road Victims, Chamber Orchestra of Luxembourg, Youth Harmony Orchestra of the European Union, as well as to Young Entrepreneurs Luxembourg and Special Olympics Luxembourg Associations. [7]

During the summer of 1997, Guillaume participated as a member of Luxembourg Scout Movement in a humanitarian camp in Nepal. He was involved in a reforestation project and other actions for the benefit of less fortunate communities. In 2017, he joined the board of directors of the World Scout Foundation to support the development of scouting around the world. [7]

In 1999, he participated in a charitable mission in Aguascalientes to provide the educational and social assistance to young people in one of the most deprived areas in Mexico. After having chaired the Kräizbierg Foundation, which works for people with disabilities, for more than 10 years (2000–2011), he accepted the title of honorary president in March 2011. [7]

During the 2001–2002 academic year, the Hereditary Grand Duke completed officer training at the Royal Military Academy Sandhurst in the United Kingdom. Following the completion of his training, he was commissioned as a lieutenant in the Luxembourg Army by grand-ducal decree of 25 July 2002. In December of that year, he took the officer's oath of the Luxembourg Army at the Military Centre in Diekirch, in the presence of his family and national authorities. He is also a Knight of the Order of the Golden Lion of Nassau.

After his military training, he pursued university studies in international politics in both the United Kingdom and Switzerland. He subsequently attended the Institut Albert-le-Grand in Angers, France, completing a bachelor's degree in Humanities and Political Science at IRCOM. He also undertook internships in 2003 at Union Chimique Belge and in 2004 at Deutsche Bank in London.

From 10 June 2005 until his appointment as lieutenant-representative in 2024, Prince Guillaume served as a member of Luxembourg's Council of State, thereby gaining direct exposure to the country's political life. In the sporting domain, he granted his high patronage to the Luxembourg Cycling Sports Federation.

On the occasion of his 25th birthday in 2006, Luxembourg issued a commemorative €2 coin bearing his effigy alongside that of his father.

In September 2018, the Hereditary Grand Duke and his wife took up residence in London. There, Guillaume pursued postgraduate studies at the Royal College of Defence Studies. Founded in 1927, the institution welcomes around one hundred participants annually from more than 50 countries, offering courses in international relations, geopolitics, and strategic management for future high-level leaders. During this period, Princess Stéphanie enrolled in an art history program at the Sotheby's Institute of Art.

He is furthermore regarded by French legitimists as thirty-fourth in the line of succession to the throne of France.

Since 18 January 2016, Guillaume has been a member of the board of directors of Europäische Stiftung Kaiserdom zu Speyer Foundation. [7] He is also a member of the board of directors of the Fondation du Grand-Duc et de la Grande-Duchesse. [7]

On 23 June 2024, during the celebrations of Luxembourg's National Day, Grand Duke Henri announced that he would appoint Prince Guillaume as lieutenant-representative in October, marking the first stage in the transfer of grand-ducal powers and preparing the way for the monarch's abdication. The investiture ceremony took place on 8 October at the Grand Ducal Palace, followed by proceedings at the Chamber of Deputies. On 24 December, in his annual Christmas address, the Grand Duke announced that his abdication and the transfer of power to Guillaume would take place on 3 October 2025. [8]

He previously served as the Lieutenant Representative (Regent) for his father, Grand Duke Henri, from 8 October 2024, until his accession to the throne [9] .

Marriage and fatherhood

On interviews for his 30th birthday, he stated that he was in a relationship with a "dear miss" that had been going strong for more than a year but needed more time to evaluate their possible future. On 26 April 2012, the court announced the engagement of the Hereditary Grand Duke to the Belgian Countess Stéphanie de Lannoy. [10] The civil wedding took place on 19 October 2012; the religious wedding took place on 20 October 2012, at the Notre-Dame Cathedral. [11]

Guillaume and Stéphanie have two sons, who are first and second in the line of succession to the throne of Luxembourg: [12] [13]

Reign

Guillaume V with Stephanie on the day of his accession to the throne Trounwiessel 2025 EuCo (111).jpg
Guillaume V with Stéphanie on the day of his accession to the throne

On 8 October 2024, as had been announced by Grand Duke Henri on his Official Birthday that year, Guillaume was appointed as lieutenant representative (regent). [14] Under this capacity, he assumed a number of his father's constitutional powers, [15] such as the swearing in of ambassadors and the signing of Grand Ducal Decrees. This is traditionally the first step in the abdication process in Luxembourg, as both Jean (1961–1964) and Henri (1998–2000) have previously served in the position. [16] On 24 December 2024, during his Christmas message, Henri announced that the abdication would take place on 3 October 2025. [17]

Guillaume V taking the oath Trounwiessel 2025 EP (106).jpg
Guillaume V taking the oath

Guillaume acceded to the throne on that date, becoming Grand Duke of Luxembourg. [18]

Titles and honours

Honours

National honours

DateAppointmentRibbonOther
7 October 2000 – 3 October 2025Knight of the Order of the Gold Lion of the House of Nassau Ordre du Lion d'Or de la Maison de Nassau ribbon.svg [19]
3 October 2025 – presentCo-Grand Master and Knight of the Order of the Gold Lion of the House of Nassau
11 November 1981 – 3 October 2025Grand Cross of Order of Adolphe of Nassau LUX Order of Adolphe Nassau Grand Cross BAR.png [20]
3 October 2025 – presentGrand Master and Grand Cross of the Order of Adolphe of Nassau
23 June 2012 – 3 October 2025Grand Cross of the Order of the Oak Crown Ordre de la couronne de Chene GC ribbon.svg
3 October 2025 – presentGrand Master and Grand Cross of the Order of the Oak Crown
3 October 2025 – presentGrand Master of the Order of Merit of the Grand Duchy of Luxembourg LUX Ordre de Merite du Grand-Duche de Luxembourg - Chevalier BAR.svg

Foreign honours

CountryDateAppointmentRibbonOther
Flag of Belgium (civil).svg Belgium 15 October 2019Grand Cross of the Order of the Crown BEL Kroonorde Grootkruis BAR.svg
23 October 2025Grand Cordon of the Order of Leopold BEL - Order of Leopold - Grand Cordon bar.svg
Flag of France.svg France 5 March 2015Grand Officer of the Order of the Legion of Honour Legion Honneur GO ribbon.svg
Flag of Italy.svg Italy 30 January 2009Knight Grand Cross of the Order of Merit of the Italian Republic ITA OMRI 2001 GC BAR.svg [21] [22]
Flag of the Netherlands.svg Netherlands 21 March 2012Knight Grand Cross of the Order of Orange-Nassau Order of Orange-Nassau ribbon - Knight Grand Cross.svg
30 April 2013Recipient of the King Willem-Alexander Inauguration Medal NLD Inauguration Medal 2013.svg
Flag of Portugal (official).svg Portugal 23 May 2017Grand Cross of the Order of Aviz PRT Military Order of Aviz - Grand Cross BAR.svg [23]
Flag of Senegal.svg Senegal 24 February 2023Commander of the National Order of the Lion SEN Order of the Lion - Commander BAR.svg [24]
Flag of Slovakia.svg Slovakia 7 September 2005Grand Officer of the Order of the White Double Cross SVK Rad Bieleho Dvojkriza 1 triedy BAR.svg [25]
Flag of the United Kingdom.svg United Kingdom 22 September 2020Recipient of the Sandhurst Medal Sandhurst Medal ribbon bar.svg [26]

Awards

See also

References

  1. "Droits de Succession: Ordre successoral". Cour Grand-Ducale de Luxembourg. Maréchalat de la Cour. 6 June 2011. Archived from the original on 3 June 2014. Retrieved 20 December 2012.
  2. "The history of the Nassau dynasty". Grand Ducal Court of Luxembourg. Retrieved 4 October 2025. He thus assumed the title Guillaume V, Grand Duke of Luxembourg
  3. 1 2 3 4 5 6 7 "H.R.H Grand Duke". Grand Ducal Court of Luxembourg. Retrieved 4 October 2025.
  4. 1 2 3 4 "CURRICULUM VITAE OF HIS ROYAL HIGHNESS THE HEREDITARY GRAND DUKE OF LUXEMBOURG" (PDF). Grand Ducal Court of Luxembourg (official). Luxembourg: Cour Grand Ducale. 9 November 2020. Archived from the original (PDF) on 20 June 2020. Retrieved 9 December 2020. Prince Guillaume attended primary school in Lorentzweiler and continued his education in the Lycée Robert Schuman until the fourth year of Luxembourgish secondary education. Then he pursued his studies at the Le Rosey Institute and at the Collège Beausoleil in the Swiss Alps, where he passed his French Baccalaureate in 2001. From September 2001 until August 2002, the Hereditary Grand Duke accomplished his Officer training at the Sandhurst Royal Military Academy in the United Kingdom....In 2009, the Hereditary Grand Duke graduated with honours with a Bachelor's degree in Humanities and Languages, specialising in Political Science, at the University of Angers (France).
  5. Strauch, Vanessa (3 October 2025). "Un lycéen «attentif, un peu rêveur, jamais bruyant»". L'Essentiel (in French).
  6. "H.R.H. Guillaume the hereditary Grand Duke of Luxembourg". University of Luxembourg. Luxembourg: Université du Luxembourg. Archived from the original on 9 December 2020. Retrieved 9 December 2020. After his military training at the Royal Military Academy Sandhurst, Guillaume studied history and politics at the University of Durham, at Brunel University in London and at the University of Angers in France.
  7. 1 2 3 4 5 6 7 "Le Grand-Duc Héritier" [The Hereditary Grand Duke]. Cour Grand-Ducale de Luxembourg (in French). Retrieved 11 December 2018.
  8. Walt, Vivienne (3 October 2025). "Inside Luxembourg's Palace as Guillaume Readies to Take the Throne". TIME. Retrieved 6 October 2025.
  9. "H.R.H. the Grand Duke | Cour grand-ducale". monarchie.lu. Retrieved 6 October 2025.
  10. "Guillaume et Stéphanie se financent demain". Luxemburger Wort. 27 April 2012. Retrieved 26 April 2012.
  11. Nikkhah, Roya (20 October 2012). "Luxembourg's royal wedding draws regal guest list". The Telegraph.
  12. "Luxembourg royal baby boy born on Sunday". luxtimes.lu. 10 May 2020. Archived from the original on 21 October 2020. Retrieved 14 November 2021.
  13. "Hereditary Grand Ducal couple announces birth of new baby". today.rtl.lu. 27 March 2023. Retrieved 27 March 2023.
  14. Cour Grand-Ducale [@CourGrandDucale] (9 July 2024). "S.A.R. le Grand-Duc héritier comme lieutenant-représentant de S.A.R. le Grand-Duc aura lieu dans l'après-midi du mardi 8 octobre 2024" (Tweet) via Twitter.
  15. Cour Grand-Ducale [@CourGrandDucale] (23 June 2024). "An deem Kontext well ech, mat der #GrandeDuchesse, dem Prenz Guillaume an der Prinzessin Stephanie, iech matdeelen, dass ech decideiert hun desen October dem Prenz Gullaume d'Lieutenance ze iwerdroen" (Tweet) via Twitter.
  16. "A tradition of abdication – Luxembourg & the Netherlands". 28 June 2024.
  17. "Grand Duke Henri confirms date of retirement" . Luxembourg Times . 24 December 2024. Retrieved 29 December 2024.
  18. "EU-member Luxembourg enthrones monarch, drawing hundreds". France 24. 3 October 2025. Retrieved 3 October 2025.
  19. 1 2 "Honorary distinctions of the Grand Duchy of Luxembourg" (PDF). Service Information et Presse. Archived from the original (PDF) on 18 January 2017. Retrieved 20 April 2017.
  20. Princes and Princesses of the Grand-Ducal House of Luxembourg are Grand Crosses of the Order by birth but the decoration is worn only after they reach their majority (18 years old) [19]
  21. quirinale.it
  22. Gazzetta Ufficiale
  23. "ENTIDADES ESTRANGEIRAS AGRACIADAS COM ORDENS PORTUGUESAS – Página Oficial das Ordens Honoríficas Portuguesas".
  24. "Palais : Macky Sall reçoit le grand-Duc héritier Guillaume de Luxembourg". Senegal7 (in French). 25 February 2023. Retrieved 24 August 2025.
  25. Slovak republic website, State honours Archived 13 April 2016 at the Wayback Machine (click on "Holders of the Order of the 2nd Class White Double Cross" to see the holders' table) : 2nd Class received by Hereditary Grand-Duke in 2005, i.e. during the state visit Archived 24 May 2011 at the Wayback Machine (French) of Grand-Duke, Grand-Duchess & Hereditary Grand-Duke in Slovakia (7 September 2005).
  26. "Grand Duke, Hereditary Grand Duke Awarded Sandhurst Medal". Chronicle.lu. 23 September 2020.
  27. HRH Prince Guillaume of Luxembourg awarded Bronze Wolf for exceptional service to Scouting
Guillaume V, Grand Duke of Luxembourg
Cadet branch of the House of Nassau
Born: 11 November 1981
Regnal titles
Preceded by Grand Duke of Luxembourg
2025–present
Incumbent
Heir apparent:
Prince Charles of Luxembourg
Titles in pretence
Preceded by
Henri
 TITULAR 
Duke of Nassau
2025–present
Reason for succession failure:
Prussian annexation of Nassau in 1866
Incumbent