Kate Middleton is known officially as the Duchess of Cambridge but in the royal household Prince Williams prefers to a more affectionate term of endearment for his other half.
While discussing his plans to raise his children as Aston Villa supporters at a recent public appearance with England's Women's Football team, the 32-year-old monarch let slip that he refers to his wife as "the missus".
Will, who is a president of English football's governing body, the Football Association (FA), admitted that he needed Middleton's permission before he could take Prince George and Princess Charlotte to football games.
"I'll have to pass that by the missus, see how I can get away with it!" he quipped. "At the moment, at 22 months, it's a little early."
If George and Charlotte do follow in the footsteps of their ardent dad, they would join the growing ranks of famous Villa fans, like Hollywood star Tom Hanks, Prime Minister David Cameron and violinist Nigel Kennedy.
"The responsible thing would be to say, to let him make his own mind up, but I think I might be quite biased," the Prince admitted.
"I haven't quite worked out how to play that yet. If he supports Villa, it'd be fantastic. I'd love to go to the odd match with him in the future," the father-of-two said. "It'll probably end up being that Charlotte is the Villa fan."
Meanwhile, William has also revealed that having two children under the age of two isn't easy. The second in line to the British throne and the Duchess welcomed their second child, Princess Charlotte on 2 May, weighing 8lb 3oz, just two hours after Middleton was admitted to the Lindo Wing of St Mary's Hospital.
"He said George is very lively, and Princess Charlotte has been keeping him up all night, giving him a few sleepless nights," England's Women's team captain, Steph Houghton, told reporters.