Zach Galifianakis is a changed man.

He's not only a father now to a 13-month old son, but also almost half the size he used to be, which brings us back to a time when the actor Jonah Hill lost a shocking amount of weight about three years ago.

The "Hangover" star has been making light of his recent weight loss, joking to E! News that he's "dying" and stating that his suit jacket was a "ladies [size] 50," according to The Daily Mail.

Unlike Jonah Hill's rather sudden weight loss, Galifianakis' change in figure was much more gradual, which involved the comedian cutting out "vodka with sausage" and his ritual of drinking "20 beers a night," according to ABC News.

The "Muppets Most Wanted" star's recent weight loss can be also be credited to the birth of his son, who he was gushing about during his appearance on "The Tonight Show."

"I think fatherhood is just the greatest thing. It really, really is," stated Galifianakis.

He added, "And I'm not a particularly religious person, but when I saw that I was like, 'Oh, there's a god. It all makes sense now. It's by design."

Zach Galifianakis reportedly married his longtime girlfriend, Quinn Lundberg, the 31-year-old co-founder of the charity Growing Voices, in August 2012.

Despite the actor's openness regarding his weight loss and even bathing his son, reportedly noting that "his testicles fit perfectly in my belly button," the 45-year-old Emmy Winner didn't reveal the name of his baby boy.

"His name is Shiela," Galifianakis joked to host Jimmy Fallon.

He added, "We haven't named it yet. It has a number right now: one. The first one!"