Princess Caroline of Hanover drives a old-timer during a commemoration ceremony for the centenary of the birth of Prince Rainier III of Monaco, in Monaco, May 31, 2023. Daniel Cole/Pool via REUTERS 

Princess Caroline of Hanover, Princess Stephanie of Monaco, Prince Albert II of Monaco, his wife Princess Charlene, right, and their children Prince Jacques and Princess Gabriella pose during a commemoration ceremony for the centenary of the birth of Prince Rainier III of Monaco, in Monaco, May 31, 2023. Daniel Cole/Pool via REUTERS 

Prince Albert II of Monaco and Princess Caroline of Hanover attend the commemoration ceremony for the centenary of the birth of Prince Rainier III of Monaco, in front of the Palace of Monaco, in Monaco May 31, 2023. REUTERS/Eric Gaillard/Pool 

Prince Albert II of Monaco and Princess Caroline of Hanover attend the commemoration ceremony for the centenary of the birth of Prince Rainier III of Monaco, in front of the Palace of Monaco, in Monaco May 31, 2023. REUTERS/Eric Gaillard/Pool 

Prince Albert II of Monaco and Princess Caroline of Hanover attend the commemoration ceremony for the centenary of the birth of Prince Rainier III of Monaco, in front of the Palace of Monaco, in Monaco May 31, 2023. REUTERS/Eric Gaillard/Pool 

Formula One F1 - Monaco Grand Prix - Circuit de Monaco, Monte Carlo, Monaco - May 28, 2023 Pierre Casiraghi, son of Caroline, Princess of Hanover is pictured ahead of the race REUTERS/Piroschka Van De Wouw 

Formula One F1 - Monaco Grand Prix - Circuit de Monaco, Monte Carlo, Monaco - May 28, 2023 Pierre Casiraghi, son of Caroline, Princess of Hanover and his wife Beatrice Borromeo are pictured ahead of the race REUTERS/Piroschka Van De Wouw 

Formula One F1 - Monaco Grand Prix - Circuit de Monaco, Monte Carlo, Monaco - May 28, 2023 Pierre Casiraghi, son of Caroline, Princess of Hanover and his wife Beatrice Borromeo are pictured ahead of the race REUTERS/Piroschka Van De Wouw 

Formula One F1 - Monaco Grand Prix - Circuit de Monaco, Monte Carlo, Monaco - May 28, 2023 Pierre Casiraghi, son of Caroline, Princess of Hanover and his wife Beatrice Borromeo are pictured ahead of the race REUTERS/Piroschka Van De Wouw 

Formula One F1 - Monaco Grand Prix - Circuit de Monaco, Monte Carlo, Monaco - May 28, 2023 Charlotte and Andrea Casiraghi, children of Caroline Princess of Hanover are pictured with her husband Film producer Dimitri Rassam ahead of the race REUTERS/Stephane Mahe 

Formula One F1 - Monaco Grand Prix - Circuit de Monaco, Monte Carlo, Monaco - May 28, 2023 Charlotte and Andrea Casiraghi, children of Caroline Princess of Hanover are pictured with her husband Film producer Dimitri Rassam ahead of the race REUTERS/Stephane Mahe 

Formula One F1 - Monaco Grand Prix - Circuit de Monaco, Monte Carlo, Monaco - May 28, 2023 Charlotte Casiraghi, daughter of Caroline, Princess of Hanover is pictured with her husband Film producer Dimitri Rassam ahead of the race REUTERS/Stephane Mahe 

Formula One F1 - Monaco Grand Prix - Circuit de Monaco, Monte Carlo, Monaco - May 28, 2023 Andrea and Charlotte Casiraghi the son and daughter of Caroline, Princess of Hanover are pictured ahead of the race REUTERS/Stephane Mahe 

Formula One F1 - Monaco Grand Prix - Circuit de Monaco, Monte Carlo, Monaco - May 28, 2023 Charlotte Casiraghi, second child of Caroline, Princess of Hanover is pictured ahead of the race REUTERS/Stephane Mahe 

The 76th Cannes Film Festival - Screening of the film "Killers of the Flower Moon" Out of Competition - Red Carpet Arrivals - Cannes, France, May 20, 2023. Princess Caroline of Hanover, Carole Bouquet and Paul Rassam pose. REUTERS/Eric Gaillard 

The 76th Cannes Film Festival - Screening of the film "Killers of the Flower Moon" Out of Competition - Red Carpet Arrivals - Cannes, France, May 20, 2023. Carole Bouquet and Princess Caroline of Hanover pose. REUTERS/Eric Gaillard 

The 76th Cannes Film Festival - Screening of the film "Killers of the Flower Moon" Out of Competition - Red Carpet Arrivals - Cannes, France, May 20, 2023. Princess Caroline of Hanover poses. REUTERS/Eric Gaillard 

The 76th Cannes Film Festival - Screening of the film "Killers of the Flower Moon" Out of Competition - Red Carpet Arrivals - Cannes, France, May 20, 2023. Princess Caroline of Hanover poses. REUTERS/Eric Gaillard 

Stephane Bern, Zouleika Penniman, Christian Louboutin, Albert II Prince of Monaco, Caroline Princess of Hanover, and Mika attend the 'Bal de la Rose' (Rose Ball), in Monaco, on March 25, 2023. Daniel Cole/Pool via REUTERS 

Caroline Princess of Hanover, Christian Louboutin, Charlotte Casiraghi, Tatiana Santo Domingo, Albert II Prince of Monaco, Princess Alexandra of Hanover, Ben Sylvester Strautmann, Pierre Casiraghi, and Beatrice Borromeo attend the 'Bal de la Rose' (Rose Ball), in Monaco, March 25, 2023. Daniel Cole/Pool via REUTERS 

Christian Louboutin, second from left, Princess Caroline of Hanover, Prince Albert II of Monaco, and Stephane Valeri attend the 'Bal de la Rose' (Rose Ball), in Monaco, March 25, 2023. Daniel Cole/Pool via REUTERS 

Christian Louboutin, second from left, Princess Caroline of Hanover, Prince Albert II of Monaco, and Stephane Valeri attend the 'Bal de la Rose' (Rose Ball), in Monaco, March 25, 2023. Daniel Cole/Pool via REUTERS 

Britain's Prince William, Prince of Wales, and U.S. Ambassador to Australia Caroline Kennedy, daughter of late U.S. President Kennedy, tour a space exhibit at the John F. Kennedy Presidential Library, in Boston, Massachusetts, U.S., December 2, 2022. Charles Krupa/Pool via REUTERS 

Britain's Prince William, Prince of Wales, and U.S. Ambassador to Australia Caroline Kennedy, daughter of late U.S. President Kennedy, visit the John F. Kennedy Presidential Library, in Boston, Massachusetts, U.S., December 2, 2022. Charles Krupa/Pool via REUTERS 

Britain's Prince William, Prince of Wales and U.S. Ambassador to Australia Caroline Kennedy, daughter of late U.S. President Kennedy, greet each other at the John F. Kennedy Presidential Library, in Boston, Massachusetts, U.S., December 2, 2022. Charles Krupa/Pool via REUTERS 

Britain's Prince William, Prince of Wales, and U.S. Ambassador to Australia Caroline Kennedy, daughter of late U.S. President Kennedy, tour a space exhibit the John F. Kennedy Presidential Library, in Boston, Massachusetts, U.S., December 2, 2022. Charles Krupa/Pool via REUTERS 

Britain's Prince William, Prince of Wales, and U.S. Ambassador to Australia Caroline Kennedy, daughter of late U.S. President Kennedy, tour a space exhibit the John F. Kennedy Presidential Library, in Boston, Massachusetts, U.S., December 2, 2022. Charles Krupa/Pool via REUTERS 

Britain's Prince William, Prince of Wales, and U.S. Ambassador to Australia Caroline Kennedy, daughter of late U.S. President Kennedy, tour a space exhibit the John F. Kennedy Presidential Library, in Boston, Massachusetts, U.S., December 2, 2022. Charles Krupa/Pool via REUTERS 

U.S. Ambassador to Australia Caroline Kennedy and her son Jack and daughter Tatiana wait for Britain's Prince William, Prince of Wales to arrive at the John F. Kennedy Presidential Library and Museum, at Columbia Point, in Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

Britain's Prince William, Prince of Wales, greets U.S. Ambassador to Australia Caroline Kennedy at the John F. Kennedy Presidential Library and Museum, at Columbia Point, in Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

Britain's Prince William, Prince of Wales, speaks to U.S. Ambassador to Australia Caroline Kennedy and her son Jack and daughter Tatiana at the John F. Kennedy Presidential Library and Museum, at Columbia Point, in Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

U.S. Ambassador to Australia Caroline Kennedy, her son Jack and daughter Tatiana meet Britain's Prince William, Prince of Wales at the John F. Kennedy Presidential Library and Museum, at Columbia Point, in Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

Britain's Prince William, Prince of Wales, speaks with U.S. Ambassador to Australia Caroline Kennedy and her son Jack and daughter Tatiana at the John F. Kennedy Presidential Library and Museum, at Columbia Point, in Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

Britain's Prince William, Prince of Wales, is greeted by U.S. Ambassador to Australia Caroline Kennedy and her son Jack and daughter Tatiana at the John F. Kennedy Presidential Library and Museum, at Columbia Point, in Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

Britain's Prince William, Prince of Wales meets with U.S. Ambassador to Australia Caroline Kennedy arrives, her son Jack and daughter Tatiana at the John F. Kennedy Presidential Library and Museum, at Columbia Point, Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

U.S. Ambassador to Australia Caroline Kennedy arrives with her son Jack and daughter Tatiana to the John F. Kennedy Presidential Library and Museum for a meeting with Britain's Prince William and Catherine, Princess of Wales, at Columbia Point, Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

U.S. Ambassador to Australia Caroline Kennedy arrives with her son Jack and daughter Tatiana to the John F. Kennedy Presidential Library and Museum for a meeting with Britain's Prince William and Catherine, Princess of Wales, at Columbia Point, Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

U.S. Ambassador to Australia Caroline Kennedy arrives with her son Jack to the John F. Kennedy Presidential Library and Museum for a meeting with Britain's Prince William and Catherine, Princess of Wales, at Columbia Point, Boston, Massachusetts, U.S., December 2, 2022. REUTERS/Brian Snyder 

People wait for Britain's Prince William and Catherine, Princess of Wales who are to meet with Mayor of Boston Michelle Wu and U.S. Ambassador to Australia Caroline Kennedy, in Boston, U.S., November 30, 2022. REUTERS/Brian Snyder 

People wait for Britain's Prince William and Catherine, Princess of Wales who are to meet with Mayor of Boston Michelle Wu and U.S. Ambassador to Australia Caroline Kennedy, in Boston, U.S., November 30, 2022. REUTERS/Brian Snyder 

Princess Caroline of Hanover, Pierre Casiraghi and his wife Beatrice Borromeo, Stefano Casiraghi and Francesco Casiraghi, Alexandra of Hanover stand on the Palace balcony during the celebrations marking Monaco's National Day in Monaco, November 19, 2022. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, Princess Charlene, Prince Jacques and Princess Gabriella, Princess Caroline of Hanover attend celebrations marking Monaco's National Day at the Palace in Monaco, November 19, 2022. REUTERS/Eric Gaillard/Pool 

Princess Caroline of Hanover, Pierre Casiraghi and his wife Beatrice Borromeo, Stefano Casiraghi and Francesco Casiraghi, Alexandra of Hanover stand on the Palace balcony during the celebrations marking Monaco's National Day in Monaco, November 19, 2022. REUTERS/Eric Gaillard 

Princess Caroline of Hanover, Charlotte Casiraghi, Pierre Casiraghi, Stefano Casiraghi and Francesco Casiraghi stand on the Palace balcony during the celebrations marking Monaco's National Day in Monaco, November 19, 2022. REUTERS/Eric Gaillard 

Princess Caroline of Hanover, Pierre Casiraghi, Stefano Casiraghi and Francesco Casiraghi stand on the Palace balcony during the celebrations marking Monaco's National Day in Monaco, November 19, 2022. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, Princess Charlene, Princess Caroline of Hanover and Princess Stephanie leave after a mass at Monaco Cathedral during the celebrations marking Monaco's National Day, November 19, 2022. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, Princess Charlene, Princess Caroline of Hanover and Princess Stephanie leave after a mass at Monaco Cathedral during the celebrations marking Monaco's National Day, November 19, 2022. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, Princess Charlene, Princess Caroline of Hanover and Princess Stephanie leave after a mass at Monaco Cathedral during the celebrations marking Monaco's National Day, November 19, 2022. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, Princess Charlene, Princess Caroline of Hanover and Princess Stephanie leave after a mass at Monaco Cathedral during the celebrations marking Monaco's National Day, November 19, 2022. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, left, and Princess Charlene, second left, followed with Princess Stephanie of Monaco, second right, and Princess Caroline of Hanover, right, arrive for a mass ceremony at the Monaco cathedral as part of ceremonies marking National Day, in Monaco November 19, 2022. Daniel Cole/Pool via REUTERS 

Princess Caroline of Hanover attends a mass ceremony at the Monaco cathedral as part of ceremonies marking National Day, in Monaco November 19, 2022. Daniel Cole/Pool via REUTERS 

Prince Albert II of Monaco, center right, and Princess Charlene, second left, with Princess Caroline of Hanover, left, and Princess Stephanie of Monaco, second right, attend a mass ceremony at the Monaco cathedral as part of ceremonies marking National Day, in Monaco November 19, 2022. Daniel Cole/Pool via REUTERS 

Archbishop of Monaco Dominique-Marie David welcomes Prince Albert II of Monaco, Princess Charlene, Princess Caroline of Hanover and Princess Stephanie as they arrive to attend a mass at Monaco Cathedral during the celebrations marking Monaco's National Day, November 19, 2022. REUTERS/Eric Gaillard 

Prince Albert II of Monaco, Princess Caroline of Hanover and designer Christian Louboutin pose during the Bal de la Rose (Rose Ball), in Monaco, July 8, 2022. Valery Hache/Pool via REUTERS 

Prince Albert II of Monaco, Princess Caroline of Hanover and designer Christian Louboutin pose during the Bal de la Rose (Rose Ball), in Monaco, July 8, 2022. Valery Hache/Pool via REUTERS 

Prince Albert II of Monaco, Princess Caroline of Hanover and designer Christian Louboutin pose during the Bal de la Rose (Rose Ball), in Monaco, July 8, 2022. Valery Hache/Pool via REUTERS 

Princess Caroline of Hanover, Prince Albert II of Monaco and Christian Louboutin pose for a photocall during the Bal de la Rose (Rose Ball), in Monaco, July 8, 2022. Valery Hache/Pool via REUTERS 

Pierre Casiraghi, his wife Beatrice Borromeo, Andrea Casiraghi, his wife Tatiana Santo Domingo, Princess Caroline of Hanover, Prince Albert II of Monaco, Christian Louboutin, Charlotte Casiraghi, her husband French producer Dimitri Rassam, Ben-Sylvester Strautmann and Alexandra of Hanover, pose for a photocall during the Bal de la Rose (Rose Ball), in Monaco, July 8, 2022. Valery Hache/Pool via REUTERS 

Pierre Casiraghi, his wife Beatrice Borromeo, Andrea Casiraghi, his wife Tatiana Santo Domingo, Princess Caroline of Hanover, Prince Albert II of Monaco, Christian Louboutin, Charlotte Casiraghi, her husband French producer Dimitri Rassam, Ben-Sylvester Strautmann and Alexandra of Hanover, pose for a photocall during the Bal de la Rose (Rose Ball), in Monaco, July 8, 2022. Valery Hache/Pool via REUTERS 

Princess Caroline of Hanover and designer Christian Louboutin attend the Bal de la Rose (Rose Ball), in Monaco, July 8, 2022. Valery Hache/Pool via REUTERS