Tessy Antony de Nassau

In January 2017, the couple announced their separation and intent to divorce, with divorce proceedings occurring in London. Their divorce was finalized on 4 April 2019.

On 18 January 2017, the Grand Ducal Court announced the separation of the Prince and Princess, and their intention to divorce, whereupon Princess Tessy will lose her Grand Ducal titles. However, Articles 1 and 4 of the 1995 Grand Ducal Decree (as amended) state:

In 2016, Tessy co-founded Professors Without Borders, an NGO specializing in international educational efforts and is currently its Director of Logistics. She currently works as founder and partner for Finding Butterflies Consulting, a consulting service focused on corporate social responsibility projects in education and female empowerment.

In April 2016, Tessy was awarded the Mrongovius Medal for humanitarian involvement.

Princess Tessy graduated from Richmond, The American International University in London in 2014 with a B.A. in International Relations. She wrote her thesis on the rise of nationalism in Europe, using the example of the Greek far-right party Golden Dawn. Additionally, from 2005 to 2009 Tessy attended several trainings and lectures relating to the topics of "Education and psychology." She earned her master's degree from SOAS, University of London. In 2019, she received an honorary doctorate from the Paris College of Art.

On Luxembourg's National Day on 23 June 2009, a decree was issued granting Tessy the title of Princess of Luxembourg and Princess of Bourbon-Parma with the style Her Royal Highness. The same decree gave the title Prince of Nassau and style Royal Highness to their sons Gabriel and Noah and possible future children. In 2012, Princess Tessy received the Order of Civil and Military Merit of Adolph of Nassau. The decree granting Tessy de Nassau the rank of Princess of Luxembourg was, however, unlike previous decrees conferring titles, not made transparent to the public.

On 12 March 2006, she gave birth to a boy, christened Gabriel Michael Louis Ronny de Nassau, who was born at a private Swiss hospital, Clinic des Grangettes, in Geneva. The baby was the first grandchild for Grand Duke Henri and Grand Duchess Maria Teresa.

The couple married on 29 September 2006 at a parish church in Gilsdorf. Upon their marriage, Prince Louis gave up succession rights for himself and his descendants, but retained the title of Prince of Luxembourg and the style of Royal Highness. The couple's second son, Noah Etienne Guillaume Gabriel Matthias Xavier de Nassau, was born on 21 September 2007 at Grand Duchess Charlotte Maternity Hospital. The couple's sons were initially given the surname de Nassau with no titles. Sometime after the birth of Noah, Tessy had a third pregnancy which ended in a miscarriage. She has called it "one of the most difficult situations I have ever faced."

After attending a technical high school in Pétange, (south of Luxembourg City), Tessy and her twin brother Ronny joined the Luxembourg Army at the age of 18, eventually rising to the rank of Corporal. From March to July 2004, she took part in a mission in Yugoslavia, as Sdt 1cl Chauffeur C2, in Mitrovica within KFOR, the NATO peacekeeping force in Kosovo. She is fluent in Luxembourgish, French, English, and German. She took lessons at a music school in Differdange and plays the alto saxophone.

Tessy Antony de Nassau (born 28 October 1985), formerly Princess Tessy of Luxembourg is a former member of the grand ducal family of Luxembourg as the ex-wife of Prince Louis of Luxembourg and daughter-in-law of Henri, Grand Duke of Luxembourg.

Tessy Antony was born on 28 October 1985, the daughter of François Antony and Régine Anne Heidemann. She has one older sister and three brothers. One of her older brothers died shortly after his birth.