Britain's Catherine, Princess of Wales attends the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's Catherine, Princess of Wales, Prince George, Princess Charlotte and Prince Louis attend the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's King Charles, Queen Camilla, William, Prince of Wales, Catherine, Princess of Wales, Prince George, Princess Charlotte and Prince Louis appear on the Buckingham Palace balcony as part of the Trooping the Colour parade to honour the king on his official birthday in London, Britain, June 15, 2024. REUTERS/Chris J. Ratcliffe

Britain's Catherine, Princess of Wales and Prince Louis react as they arrive for the Trooping the Colour parade which honours King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Chris J. Ratcliffe

Britain's Catherine, Princess of Wales, and Prince Louis attend the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's Princess Charlotte and Prince George attend the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's Catherine, Princess of Wales gets out of the Royal Carriage at House Guards Parade for Britain's King Charles' Birthday Parade in London, Britain June 15, 2024. UK MOD/Handout via REUTERS THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY

Britain's King Charles, Queen Camilla, William, Prince of Wales, Catherine, Princess of Wales, Prince George, Princess Charlotte, Prince Louis appear on the balcony of Buckingham Palace as part of the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's Catherine, Princess of Wales attends the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's Catherine, Princess of Wales attends the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's Catherine, Princess of Wales, Princess Charlotte and Prince Louis arrive for the Trooping the Colour parade which honours Britain's King Charles on his official birthday, in London, Britain, June 15, 2024. REUTERS/Chris J. Ratcliffe

Britain's King Charles, Queen Camilla and Anne, Princess Royal, arrive for the Trooping the Colour parade which honours King Charles' official birthday in London, Britain, June 15, 2024. REUTERS/Chris J. Ratcliffe

Britain's King Charles, Queen Camilla, William, Prince of Wales, Catherine, Princess of Wales, Prince George, Princess Charlotte, Prince Louis appear on the balcony of Buckingham Palace as part of the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's Catherine, Princess of Wales attends the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's Catherine, Princess of Wales, Princess Charlotte and Prince Louis arrive for the Trooping the Colour parade which honours Britain's King Charles on his official birthday, in London, Britain, June 15, 2024. REUTERS/Chris J. Ratcliffe

Britain's Catherine, Princess of Wales, Prince George, Princess Charlotte and Prince Louis walk during the Trooping the Colour parade which honours King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Chris J. Ratcliffe

Britain's William, Prince of Wales, Catherine, Princess of Wales, Prince George, Princess Charlotte, Prince Louis appear on the balcony of Buckingham Palace as part of the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's William, Prince of Wales, Catherine, Princess of Wales, Prince George, Princess Charlotte, Prince Louis appear on the balcony of Buckingham Palace as part of the Trooping the Colour parade to honour Britain's King Charles on his official birthday in London, Britain, June 15, 2024. REUTERS/Hollie Adams

Britain's King Charles, Queen Camilla, William, Prince of Wales, Catherine, Princess of Wales, Prince George, Princess Charlotte and Prince Louis appear on the Buckingham Palace balcony as part of the Trooping the Colour parade to honour the king on his official birthday in London, Britain, June 15, 2024. REUTERS/Chris J. Ratcliffe