The new dad's refreshingly honest comments will surely resonate with many parents – especially as it would seem he and Kate are having some night-time issues with the royal prince.
"At the moment, the only legacy I want to pass on to him [George] is to sleep more and maybe not to have to change his nappy quite so many times," William said.
William's nappy and sleep deprivation remarks were made to film maker Jane Treays who spoke to him at Kensington Palace shortly after George's birth. Treays was interviewing William for a forthcoming coming ITV documentary, Prince William's Passion: New Father, New Hope. The programme, which airs on Sunday, examines the royal's passion for conservation and wildlife.
The Radio Times reports that the prince told the programme makers that becoming a dad had made him 'more emotionally in tune with the world around him' and 'reinforced his emotional connection to Africa'.
"The wildlife is incredibly vulnerable and I feel a real protective instinct, more so now that I am a father, which is why I get emotional about it," he said.
"You want to stand up for what is very vulnerable and needs protecting. Elephants, rhinos and many other animals that are persecuted don't have a voice."
The prince also revealed that 'day dreaming' and listening to animal sounds calmed him down if he was having a difficult day (after a sleepless night and one to many explosive nappies, perhaps?).
"I do regularly daydream, and Africa is definitely one of the places I go to. I've got hundreds of animals on my iPhone, noises and sounds of the bush, so if I'm having a stressful day, I'll put a buffalo, a cricket or a newt on and it takes you back instantly to the bush. And it does completely settle me down," he said.
He added that he hopes Prince George will also 'pick up the bug of conservation' when he gets older.
Wonder if he's tried using those hundreds of animal noises to calm George at night - perhaps they will settle him down, too?
Who's going to break it to the dad of a six-week-old that he's got months more nappy changing and sleep deprivation to come?