Star baby news!

ET has confirmed that CHRIS NOTH, best known as Mr. Big on "Sex and the City," is going to be a daddy. The actor and his girlfriend, TARA WILSON, are expecting their first child.

"Chris and Tara are very happy and have always agreed to keep what is most personal in their lives private," Noth's rep tells ET.

Noth, who also appears on "Law & Order: Criminal Intent," is also working on the big-screen "Sex and the City" movie.