The Duke of Sussex is staging a charity fundraising polo match in aid of children in Africa living with HIV and Aids.
Harry will take to the field for the Sentebale Polo Cup in Berkshire, in support of his charity of the same name.
The sporting fixture has become an important annual event raising funds and awareness for Sentebale, an organisation which works with children and teenagers in Lesotho and Botswana who are coming to terms with being HIV positive, have Aids or have lost their parents to the disease.
The polo event, being held at the Royal County of Berkshire Polo Club, usually features international professional players and talented amateurs.
Harry will play on the Sentebale St Regis team, captained by Sentebale Ambassador Nacho Figueras, against the Royal Salute team, captained by Malcolm Borwick.
A 2004 gap year trip to the landlocked African nation of Lesotho inspired the duke to set up his charity two years later with the country's Prince Seeiso, younger brother of King Letsie III.
Their aim was to help youngsters in need and other children who had lost one or both parents to Aids or contracted the disease themselves.
In November 2015 Sentebale opened its £2 million Mamohato Children's Centre in Lesotho to scale up its Mamohato camps, a residential project providing psychological, social and practical support to children struggling to cope with being HIV positive.