After the match, he went to celebrate the 22-year-old's big victory during the Championship game in The Directors Club at Villa Park. While watching his favorite soccer team, Aston Villa, take on Cardiff City on April 10, William watched Aston Villa player Jack Grealish score a game-winning goal.
Due to his long pause in between saying the male and female version of the name, Royal fans think it was a proverbial slip of the tongue and he inadvertently revealed they were actually having a boy.
Has Kate Middleton been rushed to hospital? Not only is the entire Windsor crew getting ready for the wedding of Prince Harry and Meghan Markle, but soon they will also welcome Prince William and Kate Middleton's third child. While nothing's been confirmed, the public has begun taking bets on certain monikers for the young future monarch.
One thing's for sure: the child won't be named George or Charlotte.
"I'm going to insist the baby is called Jack."
United Kingdom bookmakers have been placing bets on the royal baby's name, with Albert and Arthur tied as the most popular names at 12-1, if the baby is a boy.
Despite the Prince's football match proclamation, Jack wasn't among the names high in the betting odds.