Britain's Prince William says Prince George is a "little bit of a rascal".
The Duke of Cambridge admits the tiny tot - who was welcomed into the world four weeks ago - reminds him of himself and his cheeky sibling Prince Harry when they were youngsters because he is quite a character and has a habit of playing up when it's time to go to sleep.
Speaking in an interview with CNN, he said: "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'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."
The prince admits him and his wife Duchess Catherine - previously known as Kate Middleton - were on "a high" when they introduced their newborn to the world for the first time outside the Lindo Wing of St Mary's Hospital in London, and were pleased that George - third-in-line to the throne - didn't cry the whole way through.
He explained: "I think more shock was the feeling I felt, but I was on such a high anyway, and so was Catherine, about George that really we were happy to show him off to whoever wanted to see him.
"As any new parent knows, you're only too happy to show off your new child and, you know, proclaim that he is the best looking or the best everything. It's nice that people want to see George - I'm just glad he wasn't screaming his head off the whole way through!"