Prince Guillaume of Luxembourg speaks during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Sophie Margue/Pool via REUTERS

Prince Guillaume of Luxembourg speaks during the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Sophie Margue/Pool via REUTERS

Luxembourg Grand Duke Henri and Prince Guillaume of Luxembourg with his wife Princess Stephanie attend the funeral ceremony of Luxembourg's Grand Duke Jean at the Notre-Dame Cathedral in Luxembourg, May 4, 2019. Sophie Margue/Pool via REUTERS

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg and Prime Minister of Luxembourg Xavier Bettel celebrate in the stands of court 1 as Luxembourg’s Gilles Muller wins the fourth set during his quarter final match against Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg and Prime Minister of Luxembourg Xavier Bettel celebrate in the stands of court 1 as Luxembourg’s Gilles Muller wins the fourth set during his quarter final match against Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg and Prime Minister of Luxembourg Xavier Bettel in the stands of court 1 during the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg and Prime Minister of Luxembourg Xavier Bettel in the stands of court 1 during the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg and Prime Minister of Luxembourg Xavier Bettel in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg and Prime Minister of Luxembourg Xavier Bettel in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg and Prime Minister of Luxembourg Xavier Bettel in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg and Prime Minister of Luxembourg Xavier Bettel in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg and Prime Minister of Luxembourg Xavier Bettel in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Tennis - Wimbledon - London, Britain - July 12, 2017 Crown Prince Guillaume of Luxembourg in the stands of court 1 before the quarter final match between Luxembourg’s Gilles Muller and Croatia’s Marin Cilic REUTERS/Tony O'Brien

Britain's Catherine The Duchess of Cambridge walks with Crown Prince Guillaume and Crown Princess Stephanie of Luxembourgin Luxembourg during a visit commemorations marking the 150th anniversary 1867 Treaty of London, May 11, 2017. REUTERS/Victoria Jones/Pool

Britain's Catherine The Duchess of Cambridge walks with Crown Prince Guillaume and Crown Princess Stephanie of Luxembourgin Luxembourg during a visit commemorations marking the 150th anniversary 1867 Treaty of London, May 11, 2017. REUTERS/Victoria Jones/Pool

Britain's Catherine The Duchess of Cambridge walks with Crown Prince Guillaume and Crown Princess Stephanie of Luxembourg along the Corniche in Luxembourg during a visit commemorations marking the 150th anniversary 1867 Treaty of London, May 11, 2017. REUTERS/Victoria Jones/Pool

Britain's Catherine, the Duchess of Cambridge walks with Crown Prince Guillaume and Crown Princess Stephanie of Luxembourg during events to mark the official commemoration of 1867 Treaty of London, in Luxembourg, May 11, 2017. REUTERS/Toby Melville

(L to R) Crown Grand Duke Guillaume and Crown Grand Duchess Stephanie of Luxembourg and Prince Pieter-Christiaan of Orange-Nassau chat with Prince Jean-Christophe Napoleon as King Philippe of Belgium invited them at the royal castle of Laken at the occasion of the anniversary of the battle of Waterloo, in Brussels, Belgium June 17, 2015. REUTERS/Eric Vidal

Prince Jean-Christophe Napoleon (L-R; front row), Prince Nikolaus Blucher, Queen Mathilde and King Phillippe of Belgium, Earl Arthur and Countess of Mornington, Lord Frederick Wellesley (L-R; rear row), Prince Pieter-Christiaan of Orange-Nassau, Crown Grand Duchess Stephanie and Crown Grand Duke Guillaume of Luxembourg, Earl Lukas and Countess Blucher pose for a picture on the anniversary of the battle of Waterloo, at the royal castle of Laken in Brussels, Belgium, June 17, 2015. REUTERS/Eric Vidal

Prince Jean-Christophe Napoleon (L-R; front row), Prince Nikolaus Blucher, Queen Mathilde and King Phillippe of Belgium, Earl Arthur and Countess of Mornington, Lord Frederick Wellesley (L-R; rear row), Prince Pieter-Christiaan of Orange-Nassau, Crown Grand Duchess Stephanie and Crown Grand Duke Guillaume of Luxembourg, Earl Lukas and Countess Blucher pose for a picture on the anniversary of the battle of Waterloo, at the royal castle of Laken in Brussels, Belgium, June 17, 2015. REUTERS/Eric Vidal

(L-R) Voice actress Florence Foresti, actor Guillaume Gallienne, actress Marion Cotillard and actor Laurent Lafitte pose on the red carpet as they leave after the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actor Guillaume Gallienne, actress Marion Cotillard and actor Laurent Lafitte pose on the red carpet as they leave after the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actress Florence Foresti, actor Guillaume Gallienne, actress Marion Cotillard and actor Laurent Lafitte, producer Dimitri Rassam and singer Camille pose on the red carpet as they leave after the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actress Florence Foresti, actor Guillaume Gallienne, actress Marion Cotillard and actor Laurent Lafitte pose on the red carpet as they leave after the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Eric Gaillard

(L-R) Voice actor Guillaume Gallienne, actress Florence Foresti, actor Masahiko Tsugawa, actresses Rio Suzuki and Asaka Seto, actress Clara Poincare, director Mark Osborne, actress Marion Cotillard pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Yves Herman

(L-R) Voice actors Laurent Lafitte and actor Guillaume Gallienne, actress Florence Foresti, actor Masahiko Tsugawa, actresses Rio Suzuki and Asaka Seto, actress Clara Poincare, director Mark Osborne, actress Marion Cotillard and Charlotte Vandermeersch pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actors Andre Dussolier and Guillaume Gallienne, voice actress Florence Foresti, actor Laurent Lafitte, actress actress Clara Poincare, actress Marion Cotillard, director Mark Osborne, actor Riley Osborne, and Mackenzie Foy pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(2ndL-R) Voice actors Andre Dussolier, Laurent Lafitte and actor Guillaume Gallienne, voice actress Florence Foresti, voice actor Masahiko Tsugawa, voice actresses Rio Suzuki and Asaka Seto, actress Clara Poincare, director Mark Osborne, voice actress Marion Cotillard, Charlotte Vandermeersch and Mackenzie Foy, actor Riley Osborne pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Yves Herman

(3rdL-R) Voice actors Andre Dussolier, Laurent Lafitte and actor Guillaume Gallienne, voice actress Florence Foresti, voice actor Masahiko Tsugawa, voice actresses Rio Suzuki and Asaka Seto, actress Clara Poincare, director Mark Osborne, voice actress Marion Cotillard, Charlotte Vandermeersch and Mackenzie Foy pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Eric Gaillard

(L-R) Voice actors Laurent Lafitte and actor Guillaume Gallienne, voice actress Florence Foresti, voice actor Masahiko Tsugawa, voice actresses Rio Suzuki and Asaka Seto, actress Clara Poincare, director Mark Osborne, voice actress Marion Cotillard and Charlotte Vandermeersch pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actors Andre Dussolier and Guillaume Gallienne, and actress Florence Foresti and actor Laurent Lafitte pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Yves Herman

(L-R) Voice actors Andre Dussolier and Guillaume Gallienne, voice actress Florence Foresti, voice actor Laurent Lafitte, actress actress Clara Poincare, director Mark Osborne, actor Riley Osborne, actress Marion Cotillard pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actors Andre Dussolier and Guillaume Gallienne, and voice actress Florence Foresti pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actor Riley Osborne, director Mark Osborne, voice actresses Mackenzie Foy, Marion Cotillard and Clara Poincare, voice actor Guillaume Gallienne, voice actress Florence Foresti, voice actors Laurent Lafitte and Andre Dussolier pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actors Laurent Lafitte and actor Guillaume Gallienne, voice actress Florence Foresti, voice actor Masahiko Tsugawa, voice actresses Rio Suzuki and Asaka Seto, director Mark Osborne, voice actress Marion Cotillard and Charlotte Vandermeersch pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actress Mackenzie Foy, director Mark Osborne, voice actresses Marion Cotillard and Clara Poincare, voice actor Guillaume Gallienne, voice actress Florence Foresti, voice actor Laurent Lafitte pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actor Riley Osborne, director Mark Osborne, voice actresses Mackenzie Foy, Clara Poincare and Charlotte Vandermeersch, voice actor Guillaume Gallienne, voice actress Florence Foresti, voice actors Laurent Lafitte and Andre Dussolier pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Benoit Tessier

(L-R) Voice actors Andre Dussolier and Laurent Lafitte, voice actress Florence Foresti, voice actor Guillaume Gallienne, voice actresses Clara Poincare and Marion Cotillard, director Mark Osborne, voice actress Mackenzie Foy and voice actor Riley Osborne pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Eric Gaillard

Voice actor Guillaume Gallienne (L) and voice actresses Marion Cotillard pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Eric Gaillard

(L-R) Voice actor Riley Osborne, voice actress Mackenzie Foy, director Mark Osborne, voice actresses Marion Cotillard and Clara Poincare, voice actor Guillaume Gallienne, voice actress Florence Foresti, voice actors Laurent Lafitte and Andre Dussolier pose on the red carpet as they arrive for the screening of the animated film "The Little Prince " (Le Petit Prince) out of competition at the 68th Cannes Film Festival in Cannes, southern France, May 22, 2015. REUTERS/Yves Herman

(L-R) Haiti's Public Health and Population Minister Florence Guillaume, Executive Director of the Technical Execution Unit (UTE) at the Ministry of Economy and Finance Michael De Landsheer, U.S. actor Sean Penn, French President Francois Hollande and Haiti's President Michel Martelly listen to an explanation at the new facilities of the University Hospital of the Haitian State in Port-au-Prince, May 12, 2015. REUTERS/Andres Martinez Casares

(L-R) French Social Affairs, Health and Women Rights Minister Marisol Touraine, Haiti's Prime Minister Evans Paul, U.S. actor Sean Penn, French President Francois Hollande, Haiti's President Michel Martelly and Haiti's Public Health and Population Minister Florence Guillaume pose for a photograph at the new facilities of the University Hospital of the Haitian State in Port-au-Prince, May 12, 2015. REUTERS/Andres Martinez Casares

(L-R) French Social Affairs, Health and Women Rights Minister Marisol Touraine, Haiti's Prime Minister Evans Paul, French President Francois Hollande, Haiti's President Michel Martelly and Haiti's Public Health and Population Minister Florence Guillaume pose for a photograph at the new facilities of the University Hospital of the Haitian State in Port-au-Prince, May 12, 2015. REUTERS/Andres Martinez Casares

Princess Stephanie of Luxembourg (L), wife of Luxembourg's Crown Prince Guillaume, shakes hands with Japanese Prime Minister Shinzo Abe at Abe's official residence in Tokyo October 9, 2014. REUTERS/Yoshikazu Tsuno/Pool (JAPAN - Tags: POLITICS ROYALS)

Luxembourg's Crown Prince Guillaume (L) meets with Japan's Prime Minister Shinzo Abe (R) at Abe's official residence in Tokyo October 9, 2014. REUTERS/Yoshikazu Tsuno/Pool (JAPAN - Tags: POLITICS ROYALS)

Luxembourg's Crown Prince Guillaume (L) shakes hands with Japan's Prime Minister Shinzo Abe before their talks at Abe's official residence in Tokyo October 9, 2014. REUTERS/Yoshikazu Tsuno/Pool (JAPAN - Tags: POLITICS ROYALS)

Luxembourg's Crown Prince Guillaume (L) shakes hands with Japan's Prime Minister Shinzo Abe before their talks at Abe's official residence in Tokyo October 9, 2014. REUTERS/Yoshikazu Tsuno/Pool (JAPAN - Tags: POLITICS ROYALS)

Paris St Germain's Lucas challenges Bastia's El-Hadji Ba (C) and Guillaume Gillet (L) during their French Ligue 1 soccer match at the Parc des Princes Stadium in Paris, August 16, 2014. REUTERS/Benoit Tessier (FRANCE - Tags: SPORT SOCCER)

(L-R) Britain's Prince William, his wife Catherine, Duchess of Cambridge, French President Francois Hollande, Belgium's Queen Mathilde, Belgium's King Philippe, German President Joachim Gauck, Spain's King Felipe and Luxembourg's Hereditary Grand-Duke Prince Guillaume attend a ceremony at the Cointe Inter-allied Memorial, commemorating the 100th anniversary of the outbreak of World War I (WWI) in Liege August 4, 2014. REUTERS/Yves Herman (BELGIUM - Tags: ANNIVERSARY CONFLICT SOCIETY ROYALS ENTERTAINMENT POLITICS)

(L-R) Britain's Prince William, his wife Catherine, Duchess of Cambridge, French President Francois Hollande, Belgium's Queen Mathilde, Belgium's King Philippe, German President Joachim Gauck, Spain's King Felipe and Luxembourg's Hereditary Grand-Duke Guillaume attend a ceremony at the Cointe Inter-allied Memorial to commemorate the 100th anniversary of the outbreak of World War I (WWI) in Liege August 4, 2014. REUTERS/Yves Herman (BELGIUM - Tags: ANNIVERSARY CONFLICT SOCIETY ROYALS ENTERTAINMENT POLITICS)

(L-R) Britain's Prince William, his wife Catherine, Duchess of Cambridge, French President Francois Hollande, Queen Mathilde of Belgium, King Philippe of Belgium and German President Joachim Gauck, Spain's King Felipe and Prince Guillaume, hereditary Grand-Duke of Luxembourg, attend a ceremony at the Cointe Inter-allied Memorial, commemorating the 100th anniversary of the outbreak of World War I (WWI) in Liege August 4, 2014. REUTERS/Yves Herman (BELGIUM - Tags: ANNIVERSARY CONFLICT SOCIETY ROYALS POLITICS)

French actor Guillaume Gallienne and his wife Amandine arrive at a state dinner given in honour of Britain's Queen Elizabeth and Prince Philip, Duke of Edinburgh at the Elysee Palace in Paris June 6, 2014. Queen Elizabeth continues her three-day state visit in France.REUTERS/Philippe Wojazer (FRANCE - Tags: POLITICS ENTERTAINMENT)

Director Guillaume Canet attends the French Ligue 1 soccer match between Paris st Germain and St Etienne at the Parc des Princes Stadium in Paris, March 16, 2014. REUTERS/Benoit Tessier (FRANCE - Tags: SPORT SOCCER ENTERTAINMENT)

Director Guillaume Canet attends the French Ligue 1 soccer match between Paris st Germain and St Etienne at the Parc des Princes Stadium in Paris, March 16, 2014. REUTERS/Benoit Tessier (FRANCE - Tags: SPORT SOCCER ENTERTAINMENT)

Models present creations by Haitian designer Mikko Guillaume during Haiti Fashion Week 2013 in Port-au-Prince, September 21, 2013. Picture taken September 21, 2013. REUTERS/Marie Arago (HAITI - Tags: FASHION)