The former Suits actress also revealed her adorable nickname for baby Archie, calling the little Royal tot 'bubba' when he started to drool.
Eagle-eyed fans also noticed Meghan calling Archie 'bubba' on an Instagram video which was posted to their @SussexRoyal account.
"Arch meets Archie!" gushed an Instagram post on the Duke and Duchess of Sussex's page: "This morning The Duke and Duchess were honoured to introduce their son Archie, to Archbishop, Desmond Tutu and his daughter, Thandeka."
"Their Royal Highnesses have joined The Archbishop and Thandeka to learn more about the work of The Tutu and Leah Legacy Foundation, and see first-hand how they are focussing on global awareness of the critical issues affecting the world."
As gorgous new pictures of baby Archie flood in from the Duke and Duchess of Sussex's tour of South Africa, fans are starting to point out just how similar Prince Harry and his baby son Archie Mountbatten-Windsor really are!
Photos from inside the meeting with Archbishop Desmond Tutu show the three adults barely touching their tea as they sit transfixed by tiny Archie - who bears a striking family resemblance to his dad when he was a bub.
Dressed in a pastel blue romper paired with a white long-sleeved undershirt, little Archie looked absolutely adorable (no surprises there!). And in a move that took his cuteness even further, the bub - born on May 6 this year - gave the camera a big smile as the family-of-three turn the corner and make for the stairs, where their welcoming party was waiting.