Princess Diana's most sentimental moments with her sons 21 years after death

It has been 21 years since that fateful night when Diana, the Princess of Wales, passed away in Paris along with Dodi Al-Fayed and driver Henri Paul.

She left behind two sons who have since grown into men. They will always carry the memories of their mother with them, and it's important to them to keep her legacy alive.

Prince William said in a documentary about her life titled "Diana, Our Mother: Her Life and Legacy" that it's important for his children to know who their grandmother was.

Both sons recall that Princess Diana enjoyed being a mother most of all and cherished the private moments she had with her son.

Read more on our Twitter account, @amomama_usa.

Both princes have been open about the lasting effect that Princess Diana's death had on them and their mental health. Prince Harry admits that he is still struggling with panic attacks and anxiety.

This collection of photos shows Princess Diana on the beach with her boys and enjoying family time at Highgrove Gardens. Swipe to see all three images.

Growing up in the spotlight, it was inevitable that the photographers and paparazzi would jump at any opportunity to snap the princess with her sons.

One of those iconic pictures was taken at Thorpe Park in 1993 and Diana could be seen laughing with the princes as they enjoy the park rides.

Prince Harry joked that she used to dress them up in "weird shorts and [...] little sort of shiny shoes." Looking back at the photos, he can't help but laugh.

A segment of his interview can be seen in the second slide of the post below.

He said: “One thing I would love to ask her now because I genuinely think that she got satisfaction out of dressing myself and William up in the most bizarre outfits, normally matching."

They often vacationed together and could be seen soaking in the sun on. The photo below was taken in 1991 at Niagara Falls.

Another beautiful moment was captured during a skiing trip to Lech Austria in 1993. Princes William and Harry can be seen sitting next to Diana with their nanny in the background.

The princes have chosen to pay tribute to their mother in private this year, and Buckingham Palace confirmed that no official events had been planned.

Last year, the princes have commissioned a statue of their beloved mother, and it will be placed at Kensington Palace when complete.

Princess Di was laid to rest in Althorp House, a 500-acre, royally-owned park north of London.