Rose Byrne Took a Leaf Out of Madonna's Baby Name Book

Welcome to the world, little one.

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Rose Byrne and her boyfriend, Bobby Cannavale, have officially welcomed their son into the world, a fact Bobby adorably announced on The Late Show with Stephen Colbert.

"I had a baby on Monday, yeah. You know, I didn't do anything...and I'm so tired," he told Stephen after casually dropping the news. "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."

Rose and Bobby named their baby Rocco, and while this is the name of Madonna's son (as well as our favorite '90s cartoon character from Rocko's Modern Life), he's actually named after the saint. "Actually, yeah, patron saint of the sick...pretty sure," Bobby said. "Could be wrong. I'm tired." 

This is the first child for Byrne, and the second for Cannavale—who has a 20-year-old son, Jack. By the way,  Rose and Bobby began dating in 2012 and have worked together on several movies, including Spy. Clearly, Rocco is their greatest collaboration to date.

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Mehera Bonner is a news writer who focuses on celebrities and royals.