King Charles brought to tears by Prince William

Prince William brought his father King Charles to tears when he made a comment about the future of the monarchy, according to a recently unearthed clip from a documentary.

William, speaking several years ago about the estate, reportedly said he thought the "family angle" was "important" and gave some thought about what he would do when he took over control of it from his father.

According to Express UK, during the ITV documentary "Prince Charles: Inside the Duchy of Cornwall," the monarch reflected on the conversation, revealing it made him emotional.

William, now Prince of Wales, in the clip, is seen talking to second-generation farmer Mervyn Keeling, where he revealed he was already thinking about the future.

He, according to the outlet, said: "I’ve started to think about how I will inherit the Duchy one day and what I do with it. I think it’s really important, the family angle, I really do."

Charles then entered the frame, who appeared to be particularly moved by his son's comments.

Charles said: "When I saw it, I couldn’t believe it. I was deeply touched and moved by what he said. Frankly, it reduced me to tears. It did, really.

"Because, I suddenly thought, well, just hearing that from him has made the last 50 years worthwhile."

As Prince of Wales, Charles was responsible for the estate for just over 50 years. Upon the death of Queen Elizabeth II, William inherited the title from his father and became the Prince of Wales with his wife become the Princess of Wales, according to the same outlet.