The Duke of Cambridge said his son Prince George is "a little bit of a rascal" and "a little fighter" in an interview with CNN.
Describing the newest addition to the royal family, Prince William said, "He either reminds me of my brother or me when I was younger."
He said George "doesn't want to go to sleep that much, which is a little bit of a problem," and that his wife was "doing a fantastic job".
"At the moment, the only legacy I want to pass on to him is to sleep more and maybe not have to change his nappy so many times," William added.
More top news
British actress Emma Watson called for more feminists in society and called upon men to promote gender equality in a speech at the weekend.
Twitter falls out of favour and Instagram makes ground in the 2014 CoolBrands UK survey.
At a reception tonight at the Labour Party conference, our correspondent Emily Morgan believes she saw a glimpse of formidable Team Miliband