The Duke and Duchess of Sussex will celebrate the achievements of wounded servicemen and women at the Endeavour Awards.
It will be the Harry and Meghan's first joint UK event since announcing their decision to step down from royal duties.
The event is taking place at London's Mansion House on 5 March to honour sick, wounded and injured military personnel who have taken part in sporting and adventure challenges over the past year.
The couple were last seen together in public on 7 January when they visited Canada House in London to thank the nation for hosting them during their festive break in the Commonwealth country.
Harry and Meghan then announced they wanted to step back as senior royals and become financially independent.
A summit of senior royals was later convened by the Queen at Sandringham to discuss the issue, with Harry sitting down for talks with his grandmother, his father - the Prince of Wales and brother, the Duke of Cambridge.
It was later announced they would give up royal duties, split their time between Canada and the UK, with the majority spent in North America, no longer be known as Their Royal Highnesses, and their lives as working royals would end on 31 March.
The situation will be reviewed in 12 month's time.
It has also been agreed Harry will keep his tri-service military ranks as Lieutenant Commander in the Royal Navy, a Major in the British Army and a Squadron Leader in the Royal Air Force.
His role as patron of the Invictus Games Foundation will also continue, with the Duke and Duchess of Sussex due to join spectators at the 2020 edition of the competition in The Hague this May.
The Sussexes' website says these posts will not be filled until the 12-month review is complete.
The Duke ushered in his new future status on Wednesday when he told travel industry delegates attending an Edinburgh conference about his sustainable travel project to simply call him 'Harry'.
Cover image: PA.