See all the photos from King Charles' birthday parade

​King Charles III travelled along The Mall to the Trooping the Colour ceremony at Horse Guards Parade, central London, to celebrate King Charles III official birthday. (AFP photo)

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Princess of Wales Catherine made her first public appearance since her cancer diagnosis at the King's Birthday Parade "Trooping the Colour" in London. The Princess's presence at the military parade marks a cautious step back into the public eye following her recent health challenges. (Reuters image)

Britain's Princess Charlotte of Wales and ​Prince George of Wales to Buckingham Palace arrived for the King's birthday parade, "Trooping the Colour", on Horse Guards parade. (AFP image)

Britain's King Charles III (C-L) and Britain's Queen Camilla (C-R) stand with (L-R) Britain's Prince George of Wales, Britain's Prince William, Prince of Wales, Britain's Prince Louis of Wales, Britain's Catherine, Princess of Wales, Britain's Princess Charlotte of Wales, Britain's Sophie, Duchess of Edinburgh, Britain's Prince Edward, Duke of Edinburgh, Britain's Lady Louise Windsor and Britain's Princess Anne, Princess Royal, on the balcony of Buckingham Palace after attending the King's Birthday Parade "Trooping the Colour" in London. (AFP image)

Rishi Sunak, the Prime Minister of Britain, and Akshata Murty, his wife, were present at the King's Birthday Parade held on Horse Guards Parade in London. The event, known as "Trooping the Colour," is an annual celebration. (AFP image)

Royal fans held up cut-out pictures of Britain's King Charles III and Kate, Princess of Wales as they gathered in the Mall ahead of the start of the ceremony. (AP Image)

The ceremony of Trooping the Colour is believed to have first been performed during the reign of King Charles II. Since 1748, the Trooping of the Colour has marked the official birthday of the British Sovereign. (Reuters image)