Leaving his new wife at home, the Duke of Sussex visited Lesotho in southern Africa over the weekend to pay a visit to his beloved charity Sentebale.
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Prince Harry co-founded Sentebale, which means "forget me not" in Sesotho, in 2006 with Prince Seeiso of Lesotho.
The organisation helps improve the lives of children and youth living with HIV/AIDS in Africa.
Although Kensignton Palace confirmed Prince Harry was on a "private" trip to help open a new community hall at the Phelisanong Children's Centre in Pitseng, photos of his covert junket have since surfaced on social media.
The Phelisanong Children Centre's Facebook page shared an album from the event, alongside the cheeky caption which read: "Adam Bidwell, Sentebale and a guy with red hair open the the hall."
In the snaps, the off-duty Prince cuts a casual figure as he jokes about with the locals.
In one photo, the 33-year-old smiles proudly with Mamello Mokholokoe, who runs the orphanage, in front of a plaque which reads: "This hall was generously donated by Sentable for the children of Phelisanong and officially opened by His Royal Highness, the Duke of Sussex on 23rd June 2018."
In another touching pic, Prince Harry poses with a beaming student.
WATCH: Royal photographer Chris Jackson shares a behind-the-scenes glimpse of Prince Harry's secret trip. Post continues...
For the Prince, he says the inspiration in setting up Sentebale came from carrying on his mother Princess Diana's legacy.
"I want to do something really constructive with my life. I want to do something that makes my mother proud. My mother stood for something. There's a lot of unfinished business and a lot of work that my mother never completed," Harry explained last year in a documentary called Prince Harry In Africa.
According to reports, the royal took a first class flight on a commercial plan to Johannesburg on Thursday.
Prince Harry will also take part in a board meeting for conservation charity Africa Parks in Botswana, before returning to London in time for the Queen's Young Leaders event on Tuesday.