On the King's Terms Only: Charles III Has 'Left the Door Open' for Reunion During Prince Harry's U.K. Trip — But Only If Monarch Is Not 'Too Busy' Again

King Charles III is said to be "considering" a private meeting with his youngest son, Prince Harry, when the California Duke visits Britain on Monday, September 30.

This led royal author and expert Hugo Vickers to tell The Sun, "Well, he does seem to be coming quite often, doesn't he? Which in some ways is a good sign, I think," when mentioning Harry's three trips so far to the U.K. this year.

"If he keeps coming at least there is a chance at some stage he'll meet up with his father, and you know, maybe this can be a step towards some sort of reconciliation," he added. "I think there's quite a long way to go, but it's nice that he feels he can come here anyway."

The royal historian then made a blunt point and shared, "If I may put it like this, if the King wishes to see him, he will arrange to see him."

The head of state of 15 nations' reign turned two years old on September 8, and His Majesty's 24 months as monarch thus far have been "nothing short of chaotic and even a tad bit depressing," one royal insider observed.

Apart from a cancer diagnosis, Kate, Princess of Wales' former battle with the disease, and growing resistance to the Crown, the King has also had to deal with "shenanigans" from his youngest child.

Despite wishing Harry a happy 40th birthday on Sunday, September 15, the monarch is reportedly turning a corner with Sussex drama when his vacation at Balmoral Castle concludes toward the end of this month.

"The King has always been upbeat, not once has he allowed himself to question the future, he’s dealt with everything head-on," a source spilled when discussing the monarch's resilience this year. "Now he is back in business. There is a spring in his step and a renewed vigor with it too. Everything is looking positive, which is welcome. Would the King prefer relations were not as they were between his son and the family? Of course."

They continued, "Through all the trials and tribulations the King has had to deal with this year, for himself and his family, I’ve never seen a person so positive and upbeat about the future. Even though he has been receiving regular hospital treatment, having to adapt his diary and way of working for a time this year, he never once felt sorry for himself or bemoaned his situation."

The sovereign is reportedly dedicated to mending the rift between his sons, which could "play a part" in his decision to see Harry again.

"That rift sounds like one that's going to be very difficult to mend," journalist Nigel Nelson told an outlet. "If it is mendable, who would be in a better position to mend it than their father?"

The King's death will immediately make William the new monarch, and reports now reflect a potential Montecito meltdown when the news one day hits.