They are words likely to bring a certain look of trepidation to the faces of Prince George's parents.
Prince Harry has said that one of his missions as an uncle would be to make sure that his newborn nephew "has fun".
Given his track record of party-based misdemeanours, the Duke and Duchess of Cambridge might feel inclined to ensure that Uncle Harry does not exert too great an influence on his replacement as third in line to the throne.
However, if William and Kate were in need of reassurance, the prince (28) yesterday stressed that he would also make sure that his nephew "has a good upbringing" and would "keep him out of harm's way".
He added that he would be happy to babysit for his brother, if William could afford the fee.
The prince, who met his nephew at Kensington Palace on Wednesday morning, said: "When I saw him he was crying his eyes out, like all babies," and, asked if he had had a cuddle, smiled: "Of course."
He helpfully added: "It's fantastic to have an addition to the family. I only hope my brother knows how expensive my babysitting charges are." (© Daily Telegraph, London)