Princess Kate's return gives people hope of a "bright future" for the monarchy, historian Simon Heffer has claimed.
The Princess of Wales returned to public life at Trooping the Colour in June, before attending the Wimbledon Men's Singles final the following month.
Kate, 42, had stepped back from royal duties after disclosing her cancer diagnosis in March 2024.
Speaking to GB News, Heffer said: "She's enormously popular. And the fact that she turned up at Wimbledon and Trooping the Colour, I think he's reassured people that she's not perhaps as ill as some of them feared.
Kate wore a purple Safiyaa dress to honour the official Wimbledon coloursPA"It's quite clear that she's being very ill and that her recovery is going to take some time.
"I think that it's made people feel not better about the monarchy because I think the monarchy is going through a rather good patch at the moment, but I think it's made them feel more confident that it's got a bright future.
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"And everybody wishes her a rapid and complete recovery. And it's been good for morale to see that she can do these things now."
The princess admitted she was undertaking a course of preventative chemotherapy and sought privacy for herself and her family.
When asked what he thought of all the rumours that have surrounded Kate's health over the last few months, Heffer said: "I think most of them were just silly and mischievous.
"We all have a right to privacy when we're ill and the Royal Family is no exception. They've been really transparent in the last year or so.
Simon Heffer said that the monarchy has a "bright future"
GB News
"The King had cancer, and he's been treated for it still, and he was quite open about that, and she's been quite open about it.
"We don't need to know exactly where the cancer is or what it is or what the prognosis is. The royal household have made it quite clear that both His Majesty and the Princess of Wales are being treated.
"They are clearly doing well in their treatment, otherwise neither would be out in public.
"I think that it was downmarket newspapers looking for circulation-boosting stories to try and speculate about what was wrong with her.
Kate revealed her cancer diagnosis to the world in MarchGetty"They should just have left her alone."
Although she has not yet officially returned to public duties, Kate did make an appearance at the Wimbledon Men's Singles final as part of her role as royal patron of the All England Lawn Tennis and Croquet Club.
Kate attended Wimbledon alongside her sister Pippa Middleton, 40, and daughter Princess Charlotte, nine.
