| Hereditary Grand Duchess of Luxembourg
|Spouse||Guillaume, Hereditary Grand Duke of Luxembourg|
|Stéphanie Marie Claudine Christine de Lannoy|
|Father||Count Philippe de Lannoy|
|Mother||Countess Alix della Faille de Leverghem|
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|Grand Ducal Family of Luxembourg|
HRH Princess Marie Gabriele
HRH The Dowager Princess of Ligne
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Princess Stéphanie, Hereditary Grand Duchess of Luxembourg (née Countess Stéphanie Marie Claudine Christine de Lannoy, born 18 February 1984) is the wife of the Hereditary Grand Duke Guillaume of Luxembourg and is slated to become, as his consort, the Grand Duchess of Luxembourg when her future husband succeeds to the crown. She became engaged to Guillaume, Hereditary Grand Duke of Luxembourg on 27th April 2012 and married him, in a civic ceremony, on Friday, 19 October 2012, when she became Princess of Luxembourg, Hereditary Grand Duchess of Luxembourg, Hereditary Princess of Nassau, Princess of Bourbon-Parma with the style Royal Highness.
Princess Stéphanie of Luxembourg was born on 18 February 1984 in Ronse, East Flanders. She is the youngest daughter of Count Philippe de Lannoy and Countess Alix della Faille de Leverghem (1941-2012). She has seven siblings. She grew up on the family estate, the Château d'Anvaing.
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, the victor of Pavia held the Imperial title of count/countess from 1526. Stéphanie descends, through the cadet branch of the lords of Motterie, from the earliest known member of the family, Baudouin de Laval, who died c. 1301, having flourished at Lille. Since the beginning of the 19th century her ancestors have usually also been burgomasters of Anvaing. Stéphanie's paternal grandmother, née Princess Beatrice de Ligne (1898-1982), was a daughter of Ernest, 10th Prince de Ligne, head of one of Belgium's most historically powerful families. Stéphanie's maternal grandparents, Harold della Faille de Leverghem and Madeleine de Brouchoven de Bergeyck, were also members of Belgium's titled nobility belonging, respectively, to a baronial and to a comital family.
Stéphanie attended the Dutch-language Sancta Maria de Ronse school, and later moved to France to continue her education in Collège Saint-Odile. She then returned to Brussels for studies at L'Institut de la Vierge Fidèle.
She moved to Moscow where she studied Russian language and literature. She majored in German philology at Louvain-la-Neuve and also earned a master's degree in Berlin. During her master's program, she interned at L'Agence wallonne à l'Exportation in Berlin.
She speaks French, Dutch, English, German and Russian. She is interested in music, foreign languages and sports such as swimming or skiing.
The Hereditary Grand Duke and the Countess dated for about two years prior to their engagement. The betrothal was announced on 26 April 2012. Distant cousins, they share multiple descents from the Austrian fieldmarshal Charles Marie Raymond, Duke of Arenberg. Once she married Guillaume, Stéphanie became one of the only three consorts in waiting of Europe's reigning houses to have actually descended from a noble background. Others include Countess Mathilde d'Udekem d'Acoz, currently Duchess of Brabant, and Duchess Sophie in Bavaria, currently Hereditary Princess of Liechtenstein.
Countess Stephanie and the Hereditary Grand Duke married in a civil ceremony at the Town Hall, on 19 October 2012.
Their religious wedding took place on 20 October 2012 at the Cathedral of Our Lady of Luxembourg . The bride wore a dress designed by Elie Saab and the Lannoy family tiara. The bridal attendants were the bridegroom's sister and nephew, and nieces and nephew of the bride:
Princess Alexandra of Luxembourg Antonia Hamilton Prince Gabriel of Luxembourg Countess Caroline de Lannoy Countess Louise de Lannoy Isaure de le Court Lancelot de le Court Madeleine Hamilton.