Prince William and Prince Harry are set to give out a new award in memory of their late mother Princess Diana.

Prince William and Prince Harry

Prince William and Prince Harry

The royal brothers tragically lost their mother in 1997 when she was involved in a fatal car crash in Paris, France, and they are now set to award 20 people with a new Legacy Award in commemoration of the 20th anniversary of her passing.

William, 34, and 32-year-old Harry will bestow the honours on behalf of the Diana Award - a charity set up in memory of the late Princess in 1999 - at a special ceremony at St James's Palace on May 18.

Tessy Ojo, chief executive of the Diana Award, said in a statement: "Princess Diana is widely remembered for her values of compassion, kindness and service to others, irrespective of their culture, race or background.

"Twenty years on, we are delighted that both her sons - The Duke of Cambridge and Prince Harry - will be presenting this unique and prestigious Legacy Award to our future leaders at St James's Palace in London on May 18."

The inaugural Legacy Award is just one of many events the Diana Award is putting on this year in memory of the late royal, including a National Kindness Day which was celebrated last month.

Tessy said at the time: "What's 2017 all about? It's about celebrating the legacy of Princess Diana, 20 years on. We at the Diana Award know that her values and her legacy live on through the tens of thousands of young people who only know her as an historic figure, but are committed to continuing those values."

Meanwhile, it was recently announced that Prince William and Prince Harry are set to create two televised tributes to their late mother which will air on UK channels ITV and BBC in July and August respectively.

A royal 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, which is set to air in July, will focus on Diana's legacy and achievements with her charity work, whilst the BBC film - which is scheduled for August - will look back at the national and global reaction to her death.