The former couple remains friends and will raise the child together, reported New York Daily News.
"She is five-and-a-half months pregnant now, but they are not dating. His friends know about it, he is doing the right thing and will be taking care of her and his baby financially," a source said.
The baby is reportedly due in February next year. The gender of the baby and other information are unavailable, as the actor who has just completed his new movie "Prince Avalanche" hasn't commented on the baby news.