The wobbly public appearance of King Charles has Prince Harry on high alert, a new report claimed.

As cancer-stricken King Charles stepped out of his limousine into the brilliant London sunshine this week, surrounded by shouting well-wishers, it was evident he was overjoyed to be back among his people.

The return of King Charles to the public eye happened three months since the announcement of his cancer diagnosis. So, it seemed appropriate that the monarch decided to drop by the University College Hospital Macmillan Malignancy Centre in the capital.

Though the monarch looked very happy after returning to work, there were indications that King Charles is suffering from a serious illness. He allegedly appeared pale and there were times when Queen Camilla reached out to steady him.

King Charles departed the centre for another round of chemotherapy as soon as his visit was over. While these alarming hints did not ruin the monarch’s activity, they allegedly placed Prince Harry on high alert.

Most, if not all, royal fans are aware that King Charles has spent a lot of time with Queen Camilla, Prince William and Princess Kate. Prince Harry, on the other hand, has been kept at a distance by the royal family since he and Meghan decided to step down as working senior royals and resided in the U.S.

Reports suggested that the Firm has not provided Prince Harry confidential details about the cancer battles of King Charles and Princess Kate for fear of it being leaked to the public. “Harry knows he’s not being given the full picture about his one remaining parent, and it’s keeping him awake at night,” an unnamed source told New Idea Magazine.

This week, the 39-year-old will travel to London, minus his wife, Meghan Markle, and children, Prince Archie and Princess Lilibet, to commemorate the 10th anniversary of the Invictus Games, as per BBC. Insiders believe he will take this occasion to learn more about the true nature of his father's condition.

King Charles is keeping his inner circle close while undergoing chemotherapy, and he only saw Prince Harry for 30 minutes after being diagnosed in February, so some royal observers fear his son may now feel obligated to seek information from the King's advisers.

“Harry’s been pushing for a secure meeting with palace officials while he’s in London. He has lots of questions about why he’s not being kept in the loop when it comes to Charles’ health. Harry knows about as much as the wider public – which is not much at all,” the informant told the entertainment news outlet.

Another royal source defends the choice to keep the King Charles' illness secret, even from Prince Harry.

“It is a very personal thing to go through. Harry and Meghan [the Duchess of Sussex] have proved that private conversations between family members may not always remain so, and the last thing the King wants is for his diagnosis to become public fodder in the American news,” the tipster shared.

However, after watching King Charles look a little shaky during his public appearance last week, Prince Harry isn't taking no for an answer. “He loves his father and is very worried about him. He can’t stand being kept in the dark,” the snitch claimed.

Prince Harry has yet to respond to the claims that he is very worried about King Charles and that it keeps him awake at night. So, avid followers of the royal family should take all thes unverified reports with a grain of salt until everything is proven true and correct.