The 31-year-old royal said he wants to make his mother proud and his latest charity work will do just that.
Prince Harry said the only thing he wants in life is to make his mother proud, and we have a feeling this would do just that.
The 31-year-old royal has vowed to carry on Princess Diana's legacy as an advocate for HIV and AIDS awareness, a cause his late mother devoted herself to during her life and one that Harry now hopes to "shine a spotlight on."
"Building on his decade of experience in supporting young people with HIV in Lesotho [in South Africa] through his charity Sentebale," a royal spokesperson said in a statement, "The Prince is now determined to help his generation understand that the battle against the disease has not yet been won and still needs fighting."
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Harry founded Sentebale in 2006 along with Lesotho's Prince Seeiso, meant to aid children in the country suffering from extreme poverty as well as the disease.
"His Royal Highness wants to expand his own knowledge of the challenges and opportunities in the fight against the virus around the world," the statement explained. "This will see him tackling topics including testing, treatment, and prevention as well as anti-stigma efforts that were famously championed by his mother Diana, Princess of Wales."
Harry will kick off his campaign on Tuesday with a concert at Kensington Palace headlined by Coldplay. Next month, he will return to South Africa to speak at the International AIDS Conference.
"Prince Harry believes that greater public awareness of the innovations in both testing and treatment for HIV can help save lives and he wants to do his part," the statement read.
Earlier this year, Harry emotionally opened up about the "gaping hole" left in his life -- and in the world -- when Diana tragically died.
"If I can try and fill a very small part of that, then job done. I will have to, in a good way, spend the rest of my life trying to fill that void as much as possible. And so will William," he said.
"All I want to do is make my mother incredibly proud," he added. "That's all I've ever wanted to do...I know I've got a lot of my mother in me."
Hear more of his comments about his mother's legacy in the video below.