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Prince William may have just accidentally let slip whether he and Kate are expecting a baby boy or girl.

After celebrating his soccer team’s championship win on Tuesday night, where Aston Villa player Jack Grealish scored a winning goal against rivals Cardiff City, Prince William told fans: “I’m going to insist the baby is called Jack.” After a pause, William then added, “…or Jackie.”

Following the game, Grealish gave William his game-winning shirt, a gift that would sure to look perfect in a royal nursery.

The Duke and Duchess of Cambridge’s third child is due this month, and the hospital has already started to prepare for Kate’s birth.

Palace officials have not revealed Kate’s due date but it has been reported to be April 23.