King Charles III's recent return to public-facing duties and confirmation of his attendance at Trooping the Colour are positive signs amid his cancer treatment, according to a royal commentator.

Speaking to GB News, historian and royal author Gareth Russell noted that the 75-year-old British monarch likely needed medical clearance before he could confirm his attendance at next week's Trooping the Colour and return to a fuller schedule of royal duties, which includes a trip to France on June 6.

Russell said that doctors giving the "green light" to King Charles' public return is "a good sign of the monarch's health."

"We know that the King had to receive permission from his doctors to return to public duties," Russell told the outlet. "So it's a positive indicator that he's back with a soft launch into the public view."

King Charles and Queen Camilla
Britain's King Charles III and Britain's Queen Camilla waves as they leave after attending a service at St Mary Magdalene Church on the Sandringham Estate in eastern England on February 11, 2024. JUSTIN TALLIS/AFP via Getty Images

Russell said that according to recent polls, King Charles' "candor" with his battle has earned him "a huge amount of goodwill and support" from the public.

"We've heard him talking to some people during the meet and greets about shared experiences of battling cancer," the royal expert said. "I think it's been very well-received."

Russell added, "The King has said he feels as if he's come out of his cage, and he's very keen to get back to his public-facing duties."

King Charles announced on Feb. 5 that he was diagnosed with an unspecified form of cancer and was stepping back from public-facing royal duties as he underwent treatment.

However, the monarch focused on working behind the scenes and holding small audiences for months until he officially returned to outings on April 30 with a visit to a cancer hospital in London alongside his wife, Queen Camilla, People reported.

Trooping the Colour 2022
Britain's Prince George of Wales, Britain's Catherine, Princess of Wales, Britain's Prince Louis of Wales, Britain's Prince William, Prince of Wales, Britain's Princess Charlotte of Wales, Britain's King Charles III and Britain's Queen Camilla wave from the balcony of Buckingham Palace after attending the King's Birthday Parade, 'Trooping the Colour', in London on June 17, 2023. ADRIAN DENNIS/AFP via Getty Images

Queen Camilla revealed during a garden party last month that King Charles was "getting better," according to royal reporter Roya Nikkhah.

On Friday, the palace confirmed that King Charles will not miss his second Trooping the Colour as monarch despite his ongoing cancer battle.

However, King Charles will not ride on horseback when he conducts his review this year. Instead, he will be seated in a horse-drawn carriage alongside Queen Camilla.

But the attendance of the King's daughter-in-law Kate Middleton, who is also battling an undisclosed form of cancer, remains up in the air at this point.

It has been confirmed that the Princess of Wales will not carry out her role of Inspecting Officer at the traditional Colonel's Review on Saturday.

The palace is expected to announce soon whether or not she will attend the King's birthday parade on June 15.

Prince William and King Charles
Prince Charles, Duke of Rothesay, Catherine, Countess of Strathearn and Prince William, Earl of Strathearn share a joke during a visit to Dumfries House on March 05, 2013 in Ayrshire, Scotland. Danny Lawson - WPA Pool/Getty Images
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King Charles, King Charles III