Britain's Prince Louis yawns as he arrives at Westminster Abbey for King Charles' coronation ceremony, in London, Britain May 6, 2023. REUTERS/Dylan Martinez

Britain's Prince George, Princess Charlotte and Prince Louis travel in a coach, following Britain's King Charles' coronation ceremony, near Buckingham Palace, in London, Britain May 6, 2023. REUTERS/Hannah McKay

Prince and Princess of Wales, Prince William and Kate Middleton, Prince Louis and Princess Charlotte along with the members of the Royal family attend Britain's King Charles and Queen Camilla's coronation ceremony in Westminster Abbey, in London, Britain May 6, 2023. RICHARD POHLE/Pool via REUTERS

Britain's Prince George, Princess Charlotte and Prince Louis travel in a coach, following Britain's King Charles' coronation ceremony, near Buckingham Palace, in London, Britain May 6, 2023. REUTERS/Hannah McKay

Britain's Prince Louis yawns as he travels in a coach, following Britain's King Charles' coronation ceremony, near Buckingham Palace, in London, Britain May 6, 2023. REUTERS/Hannah McKay TPX IMAGES OF THE DAY

Britain's Prince Louis yawns as he travels in a coach, following Britain's King Charles' coronation ceremony, near Buckingham Palace, in London, Britain May 6, 2023. REUTERS/Hannah McKay

Princess Charlotte, Prince Louis and Catherine, Princess of Wales at the coronation ceremony of King Charles III and Queen Camilla in Westminster Abbey, London. Picture date: Saturday May 6, 2023. Yui Mok/Pool via REUTERS