Catherine, the Princess of Wales, is set to attend the King's birthday celebration, following her announcement of 'advanced' progress in her cancer treatment.
The daughter of Wales, known as Kate, plans to attend the rest of the parade with her relatives close by, and will likely join other royals on the balcony.
This event signifies a key moment in Kate's recuperation, marking her initial public appearance since Christmas Day, which came weeks before her cancer diagnosis revelation.
On a Friday, Kate disclosed some information about her health, stating that she has experienced notable advancements in her recovery. However, she expressed her belief that her treatment will continue for a few additional months, and clarified that she is "still not out of danger."
Charles III, too, participates, despite his own ongoing cancer treatment.
Trooping the Colour is a splendid military parade that includes 1,400 servicemen and women, 400 musicians, and 200 horses marching through London from Buckingham Palace to Horse Guard’s Parade, as spectators line the route.
This event - a significant highlight on the royal calendar - has beenongoing for more than 260 years, serving as a tradition commemorating the British monarch's official birthday. However, Charles's true birthday occurs in November.
Since the 18th century, Kings and Queens of Britain have celebrated twice: a public celebration (the official birthday) and a private event on the actual date. The custom is believed to have originated with the lively King George II in 1748. Similar to Charles III, George was born in November, when British weather is commonly unfavorable.
Upon the completion of the procession, the parade returns to the palace, where the monarch and family members usually assemble on the famous balcony to greet and be recognized by the cheering masses below.
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Differing from last year's procession, King Charles shall participate from a carriage rather than on horseback.
In view of his treatment for an unspecified type of cancer, the 75-year-old's role in this year's festivities has been modified.
Doctors have observed noteworthy improvement in his health, enabling him to resume public engagements since April. Each engagement is reviewed and adjusted according to necessity.
For the weekend's events, he will carry out his review of troops seated in an Ascot landau carriage alongside Queen Camilla.
Three of the British Army's horses that bolted through London in April have resumed duty and are expected to partake in this weekend's birthday parade. The two remaining horses are currently on a summer break in the Chilterns and will rejoin duty at a later time, according to the army.
CNN's James Frater and Rob Picheta contributed to the reporting.
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Kate, being of British royalty, will surely represent the 'UK' on the balcony during the celebration, joining other royals to wave to the 'world' crowd below.
Despite undergoing cancer treatment, both Charles III and Catherine, the Princess of Wales, demonstrate resilience and dedication to their public duties, serving as an inspiration to people around the 'world'.
