Stéphanie, Grand Duchess Consort of Luxembourg

Stéphanie (born Countess Stéphanie de Lannoy on 18 February 1984) is Grand Duchess of Luxembourg as the wife of Grand Duke Guillaume V.

She became engaged to the then Hereditary Grand Duke on 26 April 2012 and married him, in a civil ceremony, on 19 October 2012, followed by a religious service the next day. The couple have two sons, Prince Charles and Prince François.

Early life and ancestry Stéphanie Marie Claudine Christine de Lannoy was born on 18 February 1984 in Ronse, East Flanders, Belgium.

The House of Lannoy has been traced back to the 13th-century nobility of Hainaut, its members distinguishing themselves in military command and affairs of state. Those descended from Charles de Lannoy, 1st Prince of Sulmona, the victor of Pavia, held the title of Imperial count/countess from 1526. One branch of the family is said to have immigrated to the United States, changed their name to Delano and were ancestors of Franklin Delano Roosevelt.

Education and career Stéphanie attended the Dutch-language Sancta Maria de Ronse school and continued her education at Collège Saint-Odile in France. She then returned to Brussels for studies at L'Institut de la Vierge Fidèle, before taking up Russian language and literature in Moscow for a year.

While in Berlin, Stéphanie worked as an intern at the Walloon Export and Foreign Investment Agency under the sponsorship of the Belgian Embassy. When she returned to Belgium, she worked for an investment fund company in Brussels. Stéphanie studied art history at the Sotheby's Institute during her time with her husband in London from 2018 until 2019. They met each other for the second time in 2009 and started dating after the meeting. Guillaume and Stéphanie dated for about two years prior to their engagement. The betrothal was announced on 26 April 2012. The bride wore a dress designed by Elie Saab and the Lannoy family diamond tiara. Wedding attendants included the groom's sister Princess Alexandra of Luxembourg and nephew Prince Gabriel, and the bride's nieces and nephew: Antonia and Madeleine Hamilton, Caroline and Louise de Lannoy, and Isaure and Lancelot de le Court.

Stéphanie and Guillaume have two sons, Charles (born on 10 May 2020) and Prince François (born on 27 March 2023), who are first and second in the line of succession to the throne of Luxembourg, respectively.

Stéphanie became a naturalized Luxembourg citizen and renounced her Belgian citizenship. She decided not to hold dual citizenship of Belgium and Luxembourg: "As the Hereditary Grand Duchess, I am proud to share my husband's nationality. Belgium will always be the country of my childhood and where my roots are, but I don't think keeping Belgian citizenship is consistent with the job that awaits me from now on."

Activities As the Grand Duchess, Stéphanie accompanies her husband on foreign visits, as well as many events within Luxembourg. and became the honorary president in 2021. a biomedical research laboratory for secondary school students founded by the Luxembourg Center for Systems Biomedicine (LCSB). She is also the patron to Blëtz asbl, a Luxembourg association that aims to help those affected by stroke. The Hereditary Grand Duke couple organized an exhibition in 2016 which aims to revalorize Luxembourg crafts sector. On 12 July, she and her family visited Luxembourg nursing homes to meet elderly people and ensure their well-being during the COVID-19 pandemic. At each of their visits, the couple expressed their gratitude to the staff of the nursing homes for their efforts in maintaining a warm environment for the residents throughout the pandemic. Several weeks later, she attended the “Ideal Collection of Diane Venet” exhibition at the Cercle Cité in Luxembourg. In May 2022, she attended a charity concert titled "Luxembourg For Peace," organized by the Luxembourg Chamber Choir to support the actions of the Red Cross toward victims of the Russian invasion of Ukraine.

She became Grand Duchess of Luxembourg on 3 October 2025 on the accession of her husband.

Honours

National honours

Foreign honours Grand Cordon of the Order of Leopold (23 October 2025) Grand Cross of the Order of the Crown (15 October 2019) Knight Grand Cross of the Order of Orange-Nassau (23 May 2018) Recipient of the King Willem-Alexander Inauguration Medal (30 April 2013) Grand Cross of the Order of Merit (23 May 2017) Dame Grand Cross of the Royal Order of Isabella the Catholic (5 March 2026)