On 26 February, Wilson shared two full photos of the baby - one in a reindeer coat, and another in his animal-pattern jumper. She wrote, "My little Arch".
She previously shared a photo of her son's hand, and wrote, "My life changed the moment I met you my little Arch."
Wilson married British businessman Arthur Burnand back in April 2016, a few months after they started dating. It was in August last year that she announced they were expecting a baby.
(Photo Source: Georgina Wilson Instagram)