Prince William recalled a transformative childhood moment he shared with his brother Prince Harry in his two-part documentary “Prince William: We Can End Homelessness.”

In a clip released Saturday, the royal shared that his interest in philanthropic efforts began after his late mother, Princess Diana, took him and his brother to The Passage, a U.K. charity that supports people experiencing or at-risk of homelessness.

“My mother took me to The Passage; He took Harry and me there. “I was 11 at the time, maybe 10,” William said. “I’d never been to anything like this before and I was a little worried about what to expect.”

“My mother acted as she always did, making everyone feel at ease, laughing and joking with everyone. I remember thinking at the time: ‘If everyone doesn’t have a home, they’re all going to be really sad.’ But it was incredible to have such a happy environment,” he recalled.

“I remember having some good conversations, playing chess, chatting, and that’s when I realized there were other people out there who weren’t living the same life as you.”

William continued: “You know, when you’re quite young, you think that life is just what you see in front of you, and you don’t actually have the concept to look anywhere else. That’s when you meet people, like I did then, who put a different perspective in your head and say, ‘Well, I was living on the street last night,’ and you go, ‘Wow.’ I remember this happening.”

The documentary is believed to be the first time the royal has spoken publicly about her brother during the ongoing family dispute.

Reports emerge of escalating rift between the Duke of Sussex and his brother “Very bad” but not “irreparable” Their relationship appeared to hit another impasse over the summer when Harry requested additional security for himself and his family while visiting his home country.

Around the same time, sources also say that King Charles I stopped talking to Harry despite his son’s attempts to control the monarch’s health cancer diagnosis.

A royal insider previously told Page Six that the only way for Harry and Charles to reconcile would be for the monarch to give it to Harry. enhanced security clearance has been requesting it for several years.

“As the ruler, he is the final decision maker. “This is how father and son can make peace,” the source said.

“Prince William: We Can End Homelessness” will air on ITV in the UK on October 30 and 31.