King Charles and Queen Camilla have been tipped to become a "huge selling point" for Royal Ascot by insiders.
The King, 75, reportedly told courtiers he wants to honour the memory of his late mother by attending this summer's Royal Ascot, despite undergoing cancer treatment.
The five-day event, which is held in June, was a favourite of the late Queen Elizabeth II.
A racing source said: "Racing is an important part of the legacy that he inherited from his mother, and one that he treasures. That's why he will be so keen to go."
King Charles and Queen Camilla attending Royal Ascot
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King Charles plans to spend "at least" one day at the racing festival and will host a lunch for a select "bubble" of friends and family, according to reports.
New protocol dictates he should see members of the public in the open air, allowing him to stay safe from contracting airborne illnesses while vulnerable during his cancer treatment.
The source continued to tell The Mail: "Ascot is the perfect event for his current 'bubble'-style distancing preferences – there will be lots of fresh air and plenty of chances to be seen by royal fans who will be desperate to get a glimpse.
"I would bet that he attends on Tuesday, the day of the King Charles III stakes."
King Charles appearing emotional at Ascot in 2023
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Johnno Spence, CEO of horse racing firm, JSC Comms, said: "This is welcome news for racegoers as it means he is on the mend and the King and Queen are a crucial part of Royal Ascot and horse racing in general.
"Many people buy tickets to Royal Ascot just to watch the royal carriage procession, and the prospect of seeing the King and Queen at close quarters is a huge selling point.
"I expect there will be a sharp rise in ticket sales now.
"Charles has shown commitment to racing since becoming King and I am sure he will have some great horses running.
King Charles and Queen Camilla usually attend Ascot every year
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King Charles and Queen Camilla tipped to become 'huge selling points' for Ascot
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"The executives at Ascot will be absolutely thrilled to see him there, cheering them on."
Last year the five-furlong King Charles III Stakes was named in honour of the monarch's first racing week since ascending to the throne.
He attended all five days and was rewarded when Desert Hero, an 18-1 shot bred by Queen Elizabeth II, won the King George V Stakes.
The King was visibly moved and Camilla was seen wiping away a tear.