Princess Diana was not known as “The People’s Princess” just because it was a catchy moniker for her.

No, she became an essential person for the British to draw on and be inspired by through her charity efforts and compassion. As she famously declared, she didn’t intend to be the Queen on paper but rather the Queen in people’s hearts

could be, knowing that brothers may and would quarrel from time to time.

She desired that her sons always be best buddies.

Royal historian Robert Lacey previously revealed facts about Harry and William’s childhood, including how their mother wanted the two boys to make an important vow to her.

Lacey describes the friendship William and Harry had during their youth and adolescence in his book Battle of Brothers. Princess Diana was determined that they would remain close throughout their lives, and she wanted the boys to pledge that they would always be “best friends.”

Lacey references psychic Simone Simmons, who used to consult Diana, in the book.

“You must promise me that you will always be each other’s best friends,” Diana allegedly told Simmons’ sons. “And never let anyone come between you.”

“Both boys promised they would keep to that,” Simmons said. “They high-fived each other and cuddled their mother tightly.”

“‘Anybody would have melted at sight,” she stated. “Then they went out to play soccer.”