She was renowned for her charity work and her impeccable sense of style, but through it all, Princess Diana cherished one role above all others - that of a mother to her two beloved boys, Prince William and Prince Harry.
While they were just 15 and 12 years old when Diana was tragically killed in a Paris car crash on August 31, 1997, the memory of her legacy has never left them.
Speaking to People last year about the impact his mother had on his life, Harry revealed: "All I want to do is make my mother incredibly proud. That's all I've ever wanted to do."
And while William has gone on to marry his long-time love, Kate Middleton, and have a family of his own now, the royal has also felt his mother's presence every step of the way.
"When it came to the wedding, I did really feel that she was there," he said in an interview that aired as part of the documentary Diana, Our Mother: Her Life and Legacy.
"You know, there was times when you look to someone or something for strength and I very much felt she was there for me."
With both William and Harry opening up more than ever before about their mother and their memories of her, it's clear the People's Princess has forged a lasting legacy that will continue to burn bright in her sons.
We take a look back at Princess Diana's sweetest moments with her sons in the gallery below.
