The Royal Family's touching tribute to Princess Diana on her 56th birthday.

Princess Diana would have been 56 years old this weekend.

To honour the occasion, Prince William and Prince Harry rededicated her grave at Althorp House during a private ceremony on Saturday. The rededication also marks 20 years since Diana’s tragic death.

Diana’s family along with Kate Middleton, her brother Charles, Prince George and Princess Charlotte, also attended the ceremony.

“The Duke and Duchess of Cambridge and Prince Harry will attend a private service to re-dedicate the grave of Diana, Princess of Wales at Althorp House on Saturday 1 July,” Kensington Palace said in a statement this week.

“The service, which will fall on what would have been The Princess’s birthday, will be conducted by The Archbishop of Canterbury and attended by her family.”

According to Vanity Fair, Oval Lake and the memorial to Diana underwent an "extensive redesign" after former personal chef Darren McGrady visited the site in 2014 and discovered it had been neglected.

He pleaded with the Spencers - Diana's family - to tidy up the site.

Sad to see Earl Spencer @AlthorpEstate has neglected Princess Dianas resting place #ProveYouDidntWantHerForTheMoney pic.twitter.com/X28bVa20tb

— The Royal Chef (@DarrenMcGrady) August 14, 2014

August will mark 20 years since Princess Diana was laid to rest at Althorp House, after she died in a car crash in Paris.