London, UK - Prince William has seldom made public statements about Prince Harry amid the apparent royal family rift. But now, the eldest son of King Charles has made a rare comment about his brother.

In the upcoming two-part documentary titled Prince William: We Can End Homelessness, the heir to the British throne recalled a special moment from his childhood.

As reported by Page Six, William revealed that his interest in charity work began when his mother, the late Princess Diana, took him and Harry to The Passage – a British charity that supports people who are or are at risk of becoming homeless.

"My mother took me to The Passage; she took Harry and I both there. I must have been 11 at the time, maybe 10," he said. "I had never been to anything like that before, and I was a bit anxious about what to expect."

"My mother went about her usual, making everyone feel relaxed, having a laugh, and joking with everyone," William continued. "I remember at the time kind of thinking, 'Well, if everyone doesn't have a home, they're all going to be really sad.' But it was incredible how happy an environment it was."

He added that the experience helped him understand the drastically different life experiences people have, adding, "You know, when you're quite small, you just think life is what you see in front of you, and you don't really have concept to look elsewhere.

"It's when you meet people, as I did then, who put a different perspective in your head and say, 'Well, I was living on the street last night,' and you're like, 'Woah.' I remember that happening."

The documentary is believed to be the first time William has spoken publicly – albeit briefly – about his brother amid the ongoing family dispute.

Last month, the brothers appeared to be making more progress on rebuilding their relationship as William and his wife, Kate Middleton, wished Harry a happy 40th birthday on their official social media pages.

William and Harry reportedly haven't spoken in about two years, a split believed to be caused by the Duke of Sussex's decision to step away from his role as a working royal and subsequent revelations about the dark reality of the family.