Katherine Heigl has welcomed her third child into the world.

We have another celebrity baby to welcome into the world.

Katherine Heigl and Josh Kelley, who have been married since 2007, have had their third child –  a boy named Joshua Bishop Kelley Jr.

There’s just one thing, though — the bub isn’t exactly a “newborn”, at least not any more. He was born almost a month ago, on December 20, People reports.

The Hollywood actress, 38, and her singer-songwriter husband, 36, already have two adopted daughters together — eight-year-old Naleigh and Adalaide, four.

News of the Grey’s Anatomy star’s “unexpected” pregnancy broke in June last year. In an essay on her blog, Heigl wrote: “It is thrilling none the less… The whole pregnancy thing is new to me but the thrill of having a baby is not.”

"Seeing as I have never been pregnant and as my OB/GYN reminded me last year, I'm of advanced maternal age, I wasn't sure pregnancy was even in the cards for us. Turns out it was very much in the cards!"

Congratulations, Katherine and Josh! What lovely, lovely news.