Princes William and Harry set to honour Diana on her birthday this weekend

Prince William, Prince Harry and Duchess Kate will attend a rededication of the grave of Princess Diana this Saturday, on what would've been her 56th birthday. Photo / Getty Images

Prince William, Duchess Kate and Prince Harry will lead a special ceremony to rededicate Princess Diana's burial site today, on what would've been her 56th birthday.

Royal officials announced the trio, along with William and Kate's young children Prince George and Princess Charlotte, will attend the service.

Diana, Princess of Wales, with her sons Prince William and Prince Harry. Photo / Getty Images

It will be conducted by the Archbishop of Canterbury Justin Welby, in the grounds of Althorp House in Northamptonshire, on an island in a lake known as The Oval, reports News.com.au.

The young royals will be joined by members of Diana's family, at her final resting place within the picturesque Althorp Park's Pleasure Garden.

Media will not be allowed to attend the memorial, and it emerged overnight that Prince Charles and his wife Camilla, the Duchess of Cornwall, would be in Canada at the time.

The new commemoration comes just less than two months before the 20th anniversary of Diana's death in a Paris car crash in 1997.

Recent reports in UK media revealed that Diana's island grave had fallen into disrepair, leading to her former personal chef Darren McGrady calling for an overhaul.

An aerial photo of the island where Princess Diana is buried in the grounds of the Spencer family estate in Althorp, England. Photo / AP

A multi-million dollar project to redevelop the whole island was expected to be finished in time for the anniversary of her passing, which shook the world, on August 31.

"The Duke and Duchess of Cambridge and Prince Harry will attend a private service to rededicate the grave of Diana, Princess of Wales at Althorp House on Saturday 1 July," a Kensington Palace spokesperson said.

Prince Philip, Duke of Edinburgh, Prince William, the 9th Earl Charles Spencer, Prince Harry, and Prince Charles at Princess Diana's funeral. Photo / Getty Images

"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."

It has also been announced that William and Harry have commissioned a statue of their mother, which will stand in the public gardens of her former home, Kensington Palace in London.