Prince Guillaume, Hereditary Grand Duke of Luxembourg and Princess Stephanie, Hereditary Grand Duchess of Luxembourg Attend The 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Prince Guillaume, Hereditary Grand Duke of Luxembourg, Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Head of the 'Revelations' Fair, Aurelie Grenier and Henri Jobbe-Duval attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

 (L-R) Henri Jobbe-Duval, Prince Guillaume, Hereditary Grand Duke of Luxembourg, Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Head of the 'Revelations' Fair, Aurelie Grenier, Prime Minister of Luxembourg Xavier Bettel and Secretary of State for the Economy of Luxembourg Francine Closener attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Secretary of State for the Economy of Luxembourg Francine Closener, Prime Minister of Luxembourg Xavier Bettel, Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Prince Guillaume, Hereditary Grand Duke of Luxembourg and Architect Gauthier Destenay attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Architect Gauthier Destenay, Prime Minister of Luxembourg Xavier Bettel, Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Prince Guillaume, Hereditary Grand Duke of Luxembourg and Secretary of State for the Economy of Luxembourg Francine Closener attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Prince Guillaume, Hereditary Grand Duke of Luxembourg and Princess Barbara of Yugoslavia attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Wife of Italy's Ambassador to France, Giada Magliano and Princess Barbara of Yugoslavia attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Charles de Bourbon Parme and Princess Constance de Bourbon Parme attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Prince Charles de Bourbon Parme, Princess Constance de Bourbon Parme, their nephew Prince Guillaume, Hereditary Grand Duke of Luxembourg and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Lawyer Alexandre Ursulet, his wife Princess Anne de Bourbon Sicilies and Gonzague Saint-Bris attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Lawyer Alexandre Ursulet and his wife Princess Anne de Bourbon Sicilies attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Lawyer Alexandre Ursulet and his wife Princess Anne de Bourbon Sicilies attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Prime Minister of Luxembourg Xavier Bettel, Secretary of State for the Economy of Luxembourg Francine Closener, Prince Guillaume, Hereditary Grand Duke of Luxembourg and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Secretary of State for the Economy of Luxembourg Francine Closener, Prime Minister of Luxembourg Xavier Bettel, Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Prince Guillaume, Hereditary Grand Duke of Luxembourg and Architect Gauthier Destenay attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke of Luxembourg, Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Ambassador of Luxembourg to France, Paul Duhr and his wife Valerie attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Prime Minister of Luxembourg Xavier Bettel, Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Prince Guillaume, Hereditary Grand Duke of Luxembourg and Actress Julie Gayet attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Princess Isabella de Ligne La Tremoille and Prince Edouard de Ligne La Tremoille attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Princess Isabella de Ligne La Tremoille and Prince Edouard de Ligne La Tremoille attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Prince Edouard de Ligne La Tremoille, Princess Isabella de Ligne La Tremoille and Stylist Jean-Claude Jitrois attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Princess Stephanie, Hereditary Grand Duchess of Luxembourg presents the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Princess Stephanie, Hereditary Grand Duchess of Luxembourg presents the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Henri Jobbe-Duval and Countess Eleonore de la Rochefoucauld attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Princess Stephanie, Hereditary Grand Duchess of Luxembourg and Prince Edouard de Ligne La Tremoille attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Prince Edouard de Ligne La Tremoille and Princess Isabella de Ligne La Tremoille attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Yasmine Torjemane, Adlan Kaezar, Princess Isabella de Ligne La Tremoille and Prince Edouard de Ligne La Tremoille attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Nicolas Dadeshkeliani attends the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

(L-R) Prince Guillaume, Hereditary Grand Duke of Luxembourg, Princess Stephanie, Hereditary Grand Duchess of Luxembourg, Member of the European Parliament Viviane Reding and Gonzague Saint-Bris attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.

Prince Guillaume, Hereditary Grand Duke and Princess Stephanie, Hereditary Grand Duchess of Luxembourg attend the 'Revelations' Fair at Balcon d'Honneur du Grand Palais on May 5, 2017 in Paris, France.