The cat's out of the bag.

Ashton Kutcher seemingly let it slip that he's having a boy with wife Mila Kunis.

Already parents to daughter Wyatt, 2, Kutcher and Kunis are expecting their second child. While talking to the pregnant Savannah Guthrie on "Today" Thursday morning, Kutcher said his daughter somewhat understands that she's getting a sibling.

"She points to Mila and she's like, 'baby brother,'" Kutcher said without skipping a beat.

The notoriously private couple rarely share details of their personal life so it is safe to assume that Kutcher didn't intentionally reveal the sex of his unborn baby.

"I'm a little terrified to be honest," he also admitted to Guthrie. "It's intensely scary."

Kutcher and Kunis secretly tied the knot in July 2015. They welcomed daughter Wyatt in 2014."