Courtney Cox has revealed that her ex-husband David Arquette is having a baby boy with his girlfriend Christina McLarty. 

The 49-year-old actress, who was married to Arquette from 1999 to 2013, broke the news on The Ellen DeGeneres Show which aired in the United States yesterday (Feb 7).

Cox said: "“They’re going to have a baby boy. I hope I’m allowed to say that!”

Arquette and Cox have a nine-year-old daughter, Coco, together and the former Friends star said she can’t wait to be a big sister.

“Yeah, she’s really excited. At first she was nervous because, you know, it’s a big deal. At first, I was nervous — I was like, wooo…heavy!

 “Now it’s great and we actually all had dinner the other night. The whole family. It’s a very unique relationship. All of us, like literally, me and Christina and David and Coco. It’s great though.”