The Arquettes made their baby news public in October, with a cute video David, 45, shared on Instagram that shows Charlie talking to his mom about the ultrasound photo in his hands.
“Say, ‘Hi, brother!’ ” Christina’s voice can be heard instructing her older son.
“Hi, baby!” Charlie says, then, “Hi, brother!” before adorably planting a kiss on the snapshot
The new parents of two might have their hands full now, but according to David, his wife is likely going to knock it out of the park.
“Being pregnant and watching a little rascal that’s firmly in his terrible twos is pretty difficult,” the Scream alum told WHO in December of a then-pregnant Christina. “She a trouper, she’s doing great. She’s my hero.”
Of Charlie, his dad said he’s more than ready to be a big brother — but whether the expectations accurately foreshadowed the reality remains to be seen.
“Charlie is really cute about it. We have little books that prepare him,” the proud dad said at the time of his son’s opinion on his younger sibling-to-be. “We’ll see how it goes when it all goes down. He’s a tricky little bugger.”
E! News was the first to report the birth.
This article originally appeared on PEOPLE.com