Noam Galai/WireImage
February 08, 2016

Congratulations are in order for Rose Byrne and her longtime beau Bobby Cannavale—the famous lovebirds welcomed a baby boy named Rocco last week. Cannavale confirmed the big news during an appearance on The Late Show with Stephen Colbert on Friday, adding that little Rocco is "doing great."

"I had a baby on Monday, yes," the Boardwalk Empire star told host Stephen Colbert. "You know, I didn't do anything. We [men] don't do anything and I'm so tired. I think I've gained 28 pounds since Monday. I mean, I'm not kidding you. Like, this jacket fit so well, like, last Thursday. But I've been eating so much."

"It's all water weight," Colbert assured him.

RELATED: Rose Byrne Flaunts Her Adorable Baby Bump with Boyfriend Bobby Cannavale

The proud parents have reportedly been dating since 2012. They went public with their relationship at the 2013 Emmy Awards, when Cannavale called Bryne "the love of his life" during his acceptance speech for Outstanding Supporting Actor in a Drama Series award.

Watch Cannavale's adorable announcement on The Late Show with Stephen Colbert below.