Actress Rose Byrne has welcomed a baby boy

Actors Bobby Cannavale and Rose Byrne have announced the arrival of a baby boy. Photo / Getty
Actors Bobby Cannavale and Rose Byrne have announced the arrival of a baby boy. Photo / Getty

Rose Byrne has welcomed her first child with partner Bobby Cannavale.

The Australian actress gave birth to a boy, Rocco, on February 1, the proud father revealed on CBS' The Late Show with Stephen Colbert.

"You know, I didn't do anything ... and I'm so tired," the Vinyl star, 45, told Colbert.

"I think I've gained 28 pounds [12.7 kg] since Monday."

The 36-year-old Byrne debuted her growing baby bump at LAX airport back in October, but the notoriously private couple have revealed few details of the pregnancy.

Byrne and Cannavale began dating in 2012 and co-starred in films Adult Beginners, Annie and Spy.

Cannavale already has a 10-year-old son, Jake, from his marriage to screenwriter Jenny Lumet, which ended in 2003.

- AAP

Get the news delivered straight to your inbox

Receive the day’s news, sport and entertainment in our daily email newsletter

SIGN UP NOW

© Copyright 2017, NZME. Publishing Limited

Assembled by: (static) on production bpcf04 at 20 Jan 2017 17:15:03 Processing Time: 470ms