Royal baby Archie made Desmond Tutu go goo-goo.

Prince Harry and Meghan Markle on Wednesday took the youngest member of Britain’s royal family to meet Archbishop Tutu for his first official royal outing.

The 87-year-old anti-apartheid campaigner beamed at seeing the 4-month-old royal in South Africa, giving him a tender kiss on the forehead.

His daughter, Thandeka Tutu-Gxashe, was also clearly enamored, joking that Archie’s “going to be a ladies’ man,” according to The Sun.

Mom Meghan, 38, said that Archie — wearing light-blue overalls and white socks — was “an old soul,” while dad Harry, 35, said their son was already sued to all the cameras, the paper said.

Tutu told the prince and duchess that it was “heartwarming” to see how they are “really, genuinely are caring people,” according to a statement by his Desmond & Leah Tutu Legacy Foundation.

“We all try to make things better,” Harry replied during the meeting in Cape Town, part of their first official tour as a family.

With Post wires