London, 17 June 2023 (PA Media/dpa/MIA) – Britain's King Charles III has received the official birthday wishes of the nation during his first "Trooping the Colour" ceremony as monarch.

Pomp and pageantry were on display during the military spectacle where the most prestigious regiments in the British Army honoured their Colonel in Chief by parading to mark his anniversary.

Charles had deputized for his late mother Elizabeth II at last year’s event, also known as the Birthday Parade, but now rode onto Horse Guards Parade in Whitehall as the nation’s head of state.

He was joined on horseback by the royal colonels: Prince William of the Welsh Guards, Princess Anne of The Blues and Royals, of which she also holds the title "gold stick in waiting," a formal bodyguard position, and Prince Edward of the 1st Battalion London Guards, formed last year.

Travelling in a carriage were Queen Camilla, who is colonel of the Grenadier Guards, and William's wife Kate as colonel of the Irish Guards, along with Prince George, 9, Princess Charlotte, 8, and 5-year-old Prince Louis.

The royal party were in the midst of a sovereign’s mounted escort formed by troops from the Household Cavalry’s Life Guards and Blues and Royals, in their shining breastplates and plumed helmets, and a ripple of cheers followed them when they travelled along The Mall.

The sight of a monarch riding throughout Trooping the Colour had not happened since 1986 when Elizabeth II rode her charger Burmese for the final time.

It was a gift from the Royal Canadian Mounted Police, and Charles’ horse Noble was also from the Commonwealth country’s famous Mounties.

Trooping the Colour is a social as well as a ceremonial occasion and in the stands overlooking the parade ground were around 8,000 wives, girlfriends and parents of the guardsmen and officers on parade.

The event featured around 1,500 soldiers in total and hundreds of guardsmen were lined up on the parade ground waiting to be inspected by the king, who will be joined by the mounted royal colonels, including the queen and Kate in a carriage.

For the first time since 1989, all five regiments of Foot Guards – the Welsh, Scots, Irish, Coldstream and Grenadier – were on parade together for Trooping.

The colour, or regimental flag, that will be trooped in front of hundreds of guardsmen and officers will be the king’s colour of the 1st Battalion Welsh Guards.

Among the guests was British Prime Minister Rishi Sunak, Edward's wife Sophie, Anne's husband Vice Admiral Tim Laurence and senior military figures.