King Charles's historic birthday celebrations got underway on Saturday for Trooping the Colour, to mark the monarch's 74th birthday.
On November 14 each year, King Charles marks his birthday privately, but each year in June he marks his "official" birthday with the military spectacle where the most prestigious regiments in the British Army honour the monarch by parading for the special day.
And stealing the show once more was young Prince Louis, with the five-year-old's facial expressions keeping royal fans amused as around 8,000 spectators watched the birthday parade from Buckingham Palace to Horse Guards Parade.