As I'm sure you know, on 31 August 1997, Diana, Princess of Wales died as a result of injuries sustained in a car crash in the Pont de l'Alma road tunnel in Paris, France.

As we mark another anniversary of Princess Diana's death and watch her young boys grow into men with families of their own, it's hard to believe it's been so long since the world lost her beautiful soul.

Her sons William and Harry were so young when she passed, just 15 and 12 respectively, and the both of them recall their final conversation with their mother. Last year Prince William revealed that the last time he spoke with Diana was on the phone while she was in Paris. He had tried to speed up the conversation because he wanted to get back to playing with his cousins.

"Harry and I were in a desperate rush to say goodbye, you know, 'see you later'. If I'd known what was going to happen, I wouldn't have been so blasé about it and everything else. But that phone call sticks in my mind, quite heavily," Prince William revealed.

Prince Harry also remembers the call.

"It was her speaking from Paris. I can't really remember what I said, but all I do remember is probably regretting for the rest of my life how short the phone call was," Prince Harry shared. "Looking back on it now, it's incredibly hard. I'll have to sort of deal with that for the rest of my life. Not knowing that was the last time I was going to speak to my mum. How differently that conversation would have panned out if I'd had even the slightest inkling her life was going to be taken that night."

Even though she died young, Diana made a lasting impact on not only her sons, but the entire world. When she and Prince Charles formally separated in 1992, Diana was set to lose the title of "Her Royal Highness," which meant that she would have to curtsy to everyone in the royal family, including her own kids.

There were reports that Queen Elizabeth was totally fine with Diana keeping her title, but it was Prince Charles that remained adamant she lose it.

But in a book written by Diana's close friend and butler Paul Burrell, called A Royal Duty, Prince William made a promise to his mother after the change happened.

"Don't worry, Mummy, I will give it back to you one day when I am king".

Sadly, Diana died three years after William made this promise. Although his was never able to give his mother her title back while she was alive, it's entirely possible that when he does become King, he will do something to honor her. It's not clear whether or not he could actually posthumously give Diana the title of "Her Royal Highness," but if he can, I'm sure he will.

According to a source who spoke to People, William and Kate talk to their kids about their grandmother all the time, and have filled their home with pictures of her. The memory of Diana will forever live on in their family.

"Never being able to say the word 'Mummy' again in your life sounds like a small thing. I too have felt "” and still feel "” the emptiness on such a day as Mother's Day," William said in an interview.

Though it's been over two decades since Diana's passing, it's clear that the love she had for her children will live on forever in their hearts.

Do you think William will give his mother her title back when he becomes king?