The Duke of Cambridge described his three-week-old son Prince George as "pretty loud and of course extremely good looking" during a speech at the Anglesey Show.
Prince William said the Duchess of Cambridge and his son "would have loved" to have attended the agricultural show in North Wales with him today.
He added: "I have to say that I thought search and rescue duties over Snowdonia were physically and mentally demanding but looking after a three-week-old baby is right up there."
He went on to thank the islanders of Anglesey from the "bottom of my heart" for making him and his wife so welcome as they made their first home in North Wales together, which he described as an "immensely special place for us both".
He said: "I know that both of us will miss it terribly when my search and rescue tour of duty comes to an end next month and we have to move elsewhere."