We smile at five-year-old Prince Louis s cheeky appearances and know that, all-too-soon, he will be swept up into a life of royal duty. Besides, he is not the first to test the boundaries of behaviour.
Prince William was described as an unruly child who was 'noisy' and 'cheeky' - and once threw sandwiches around a room when he was not allowed to blow the candles on a cake