As the eldest son of the monarch, 76, and the late Princess Diana, it's no surprise that the Prince of Wales is gearing up to take over the reins as future king.

If Prince Harry ever wants to make amends with his father, King Charles III, he'll need help from his brother, Prince William, to do so, it seems.

The rift between the brothers and their father is no secret, especially since the release of Harry's tell-all book, Spare. Harry even recalled a physical fight between him and William in the book. He wrote: "It all happened so fast. So very fast. "He grabbed me by the collar, ripping my necklace, and he knocked me to the floor.

During a heated conversation with his two sons, King Charles is alleged to have made a seriously heartbreaking nine-word comment to his sons, pleading with them to change their behaviour

King Charles is said to have made a desperate plea to his warring sons Prince William and Prince Harry to end their feud.

While everything seems to be copasetic between Prince William and King Charles —the monarch's drama is primarily with his younger brother, Prince Andrew, and his other son, Prince Harry —the king and future king have a little healthy competition going.

While there's been a lot of press about King Charles' rift with Prince Harry, it seems there may also be tension in his relationship with Prince William.