They might be next in line to the throne, but Prince William and the Princess of Wales will still have to deal with their children misbehaving from time to time.
Royal fans, for example, got a glimpse of Louis being a bit naughty during the Queen's Platinum Jubilee celebrations in June and many praised Kate Middleton for how she handled the situation.
Apparently, The Princess of Wales has a 'secret code' she uses to keep her children in check when they decide to throw a temper tantrum.