A Royal UpbringingSee 30 of Prince William and Prince Harry’s Cutest Childhood Photos!

How sweet!

Prince William and his younger brother, Prince Harry, had the cutest childhood photos — especially when they posed with their late mother, Princess Diana.

Though Diana tragically passed away at age 36 in an August 1997 car crash, William and Harry have often talked about the fond memories of their royal upbringing with their mom and dad, Prince Charles.

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During a recent interview, William opened up about how he’s coped with his mother’s passing. “It has taken me almost 20 years to get to that stage. I still find it difficult now because at the time it was so raw,” he said. “And also it is not like most people’s grief, because everyone else knows about it, everyone knows the story, everyone knows her.”

Earlier this month, William similarly paid tribute to Diana in a touching speech while presenting Legacy Awards set up by the Diana Award charity to young philanthropists on Thursday, May 18.

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“This summer marks 20 years since our [mother’s death]. She achieved so much in her life. From helping to shatter the stigma around AIDS, to fighting to ban landmines and supporting the homeless — she touched the lives of millions,” the father-of-two said.

“The truth is, though, that she was taken at only 36, just slightly older than I am today. But of course, we can never know what our mother would have gone on to do,” William continued. “But in one sense Prince Harry and I feel that our mother lives on in the countless acts of compassion and bravery that she inspires in others.”

prince william prince harry princess diana getty images

William, Diana, and Harry. (Photo Credit: Getty Images)

Harry also gushed about Diana’s charitable legacy. “One of the things our mother taught William and I was the value of doing good when no one is watching,” he began.

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“She visited hospitals late at night to comfort patients; she spent hours writing letters to privately support the work of others; she achieved a lot by shining a spotlight, but she worked just as hard when the cameras were gone,” Harry continued. “Our mother once said that if we all play our part in making our children feel valued, the result will be tremendous. This result was tremendous.”

Check out the gallery to see more of William and Harry’s sweetest childhood pics!