updated 04/26/2012 AT 5:30 PM ET
•originally published 04/26/2012 AT 3:00 PM ET
The royal couple, who will celebrate their one-year anniversary on April 29, doted on a tiny baby at a party Thursday.
The prince, 29, took the 3-week-old baby, named Hugo Eric Scott, in his arms and told the baby’s dad, Vic Vicary, “He looks very sweet.”
Kate, 30, came over later to chat with the little boy’s parents, Vic and Hanna, and remarked that the baby was being “so good” as she admired his Superman-style outfit.