prince william harry
Princes William and Harry Getty

Princes William and Harry are set to open up about their mother, the late Diana, Princess of Wales, in two separate documentaries to mark the 20th anniversary of her death.

The royals have asked the BBC and ITV to make the emotional documentaries as they discuss the days after her passing when they were just 15 and 12 years old, when she died in a car crash in Paris in 1997. They will allegedly reveal their memories in the days following the accident.

William, 34, and Harry, 32, have asked the two channel networks to make the programmes and have personally selected close friends and family to take part. Some will speak publicly about Diana's death for the very first time.

One of Diana's closest friends Julie Samuel – who is godfather to Prince George – is reported to be featured along with Diana's Brother Lord Spencer, now 52, who gave a powerful eulogy at her funeral.

According to The Sunday Times, a source said: "The Duke and Prince Harry have selected close friends and family members to speak about Diana, and some will be speaking about her publicly for the first time."

The ITV documentary will be the first to air in July, one month before Diana's anniversary death on 31 August, and will focus more on her legacy and achievements in her work for causes such as HIV and landmines. Since her passing, both William and Harry have continued her legacy in their choice of charity work.

diana funeral
6 September 1997: The Duke of Edinburgh, Prince William, Earl Spencer, Prince Harry and Prince Charles walk outside Westminster Abbey during the funeral service for Diana, Princess of Wales AFP

The second programme on the BBC in August will then focus on the more moving subject of the crash, as relatives recall the reactions globally to her death on 31 August 1997.

In another nod to the 20th anniversary of their mother's death, William and Harry will build a permanent memorial statue of their mother in the public gardens of Kensington Palace. The Queen has reportedly approved of the poignant tribute.

The brothers said in a joint statement: "It has been 20 years since our mother's death and the time is right to recognise her positive impact in the UK and around the world with a permanent statue.

"Our mother touched so many lives. We hope the statue will help all those who visit Kensington Palace to reflect on her life and legacy."

On Saturday (8 April), the princes joined their father Charles at the 100th anniversary of the Battle of Vimy Ridge in France. The royal family were accompanied by Canadian Prime Minister Justin Trudeau and French President Francois Hollande.

Diana at Centrepoint
Diana, Princess of Wales speaks at the annual meeting of the housing charity Centrepoint on 7 December 1995 Reuters