This year's Trooping The Colour is one for the history books – it not only marks the first of King Charles III's reign, but it is also the first time a reigning monarch has ridden at the annual parade since 1986, when Queen Elizabeth II last rode.
The King today (Saturday, June 17) took to the streets of London alongside his son, the Prince of Wales, and was also joined by his sister, Princess Anne.
The public have become accustomed to seeing the late Queen Elizabeth's only daughter on horseback – usually decked out in her military uniform along with medals and badges.