Naomi Watts, Liev Schreiber Welcome Baby Boy

The Aussie actress' rep confirms to E! News that Watts gave birth to the couple's second child on Dec. 13

And baby makes four.

Naomi Watts and Liev Schreiber welcomed their second child yesterday.

 A rep for Watts, 40, exclusively tells E! News, "I can confirm that Naomi and Liev had a baby boy yesterday."

The happily unmarried couple have been together since 2005. Their first son, Alexander Pete, was born July 25, 2007, in Los Angeles.