Ashton Kutcher just accidentally told the whole world the sex of his second baby.

There’s probably nothing more sacred when it comes to a celebrity baby than its gender. (Maybe only it’s real due date).

So when an expecting star accidentally drops a massive hint as to what sex their next baby is on live television, it’s hard to not get a wee bit excited.

The couple are set to welcome baby number two later this year. Image via Getty.

Ashton Kutcher and Mila Kunis are already parents to a two-year-old daughter, Wyatt, and are expecting baby number two shortly. But we haven't known whether Wyatt will be welcoming a baby brother or baby sister, until now.

During an interview with the Today show, Kutcher revealed that his young daughter was excited to welcome a sibling.

"She...points to Mila and she's like 'baby brother' when she points to the belly and then she points to Dad and she goes 'beer'," he said.

"I think she gets there's something in the belly, but I don't quite think she knows that it's not going to be a plastic doll yet."

So there you have it: a little mini Ashton Kutcher is on his way into the world.