The pictures were taken by Kate’s father Michael Middleton in the family home garden in Bucklebury, Berkshire, earlier this month.
The Duke of Cambridge, 31, stands to the left of his wife in both photographs, looking on proudly with a protective arm around Kate.
Wrapped in a white blanket similar to the one he was in when he was brought out of St Mary’s Hospital in Paddington, central London, the day after he was born, the only part of George that can be seen is his head, which is crowned by a soft layer of hair.
In one of the photos, the royal couple are joined by their black cocker spaniel Lupo while Tilly, a golden retriever belonging to the Middleton family, can be seen lying down behind them.
The photos were released by Kensington Palace exactly four weeks after George was born on July 22.
In his first interview since he became a father, William said his young son reminded him of himself or Prince Harry.
“He’s a little bit of a rascal, I’ll put it that way. He either reminds me of my brother or me when I was younger, I’m not sure, but he’s doing very well at the moment,” he said.
“He’s growing quite quickly actually. But he’s a little fighter, he wriggles around quite a lot and he doesn’t want to go to sleep that much,” William said.
William also revealed that his wife Kate has been handling more of the night duties with the baby and admitted he was looking forward to going back to his job as a Royal Air Force search-and-rescue pilot.