The Duke of Cambridge spoke to CNN in his first official interview, since becoming a father, at Kensington Palace in London.
The new dad says he and his wife Kate were happy to show off their newborn son to the world, calling it a proud moment.
Prince William says baby George is already quite a character and a little fighter.
"Well, yeah he's a little bit of a rascal, let's put it that way. So 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.