As the years passed, Harper and Gideon grew up right before our eyes.

That’s been the hardest thing for me."

However, it is also exhausting just ask Neil Patrick Harris.

Neil Patrick Harris with his family

“[They’re] exhausting in every way.

They just constantly keep us on our toes,” the actor shared in a candid interview withPeople.

And they’ve grown up before our eyes.

Harper and Gideon celebrating birthday

It truly doesn’t get more teenage than that.

“Once you think you get it, you’re like, ‘Wait, what’s happening?'”

“She’s like, ‘Hey everybody, I’m here,'” the actor-turned-chef stated.

Neil Patrick Harris with his twins

Gideon, on the other hand, takes more after Harris due to his thinker tendencies.