Plus, the 'Pride and Prejudice and Zombies' actor talks sweet moments with Cypress' older sister.
Jack Huston is now a father of two and, he admits with a laugh, he can't help but think, "What have I done?!"
The Pride and Prejudice and Zombies actor welcomed a baby boy with longtime partner Shannan Click on Jan. 20. As for how they chose his unique name, Cypress Night, Jack simply says they liked it.
"It is not a name that you hear every day," he told ET. "It is an interesting one, we liked it. And 'Night'-- like his dad, he's a night owl. I'm trying to keep him in it, and he is already!"
NEWS: 'Vampire Diaries' Star Candice Accola Welcomes Baby Girl
Cypress is the couple's second child. They have a 2-year-old daughter, Sage Lavinia, and Jack says she is already shaping up to be a great big sister.
"She's really sweet and she was giving him kisses this morning," the 33-year-old actor told us. "It was a lovely thing."
While little Sage won’t be able to watch daddy's new movie -- a retelling of the classic Pride and Prejudice, but this time the Bennet sisters slay the undead -- Jack is all about the girl power in it.
"We need more of it. We really do," he said. "You watch this movie and you watch what they do and you go, 'I enjoyed that more than if it was five guys doing the same thing.' It was cool. It was sexy. It was feminism to the brim.”
In other baby news, Michael Buble just welcomed baby No. 2 with his wife. Find out his new son's name and see their sweet family photo: