The proud father, who shares two-year-old Wyatt with Mila, revealed that he wanted a second daughter so that they could try and have a third baby. He joked: "I was hoping for a girl because first of all, our first girl is unbelievable.
The couple are expecting their second child together
"But also, I figured if we had a girl second, [Mila] might give me one more shot at having a boy, and now I don't know. It's even money. She might cut me off. I want, like, 12 of them."
Ashton, 38, then confirmed that he and Mila were "very excited and very happy" about their upcoming new arrival.
The Dude, Where's My Car actor accidentally revealed the gender of the couple's second child during an interview with Savannah Guthrie on the Today show while revealing how little Wyatt reacted to being told she would be a big sister.
The pair share a two-year-old daughter, Wyatt
"We're ok. It's really exciting," he revealed. "She, like, 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.’ So 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."
He then joked about welcoming his second child, continuing: "I thought the first one was exhausting in the beginning. I'm a little terrified to be honest!"
The happy couple, who met on the set of That 70s Show, confirmed they were expecting their second baby back in June, with a source telling People magazine: "Ashton genuinely lights up when talking about Wyatt and the little one on the way. Everything about being a father is natural to him."