"I'm thrilled for him!" she says.

Mom SARAH JESSICA PARKER tells us she's over the moon to hear that her "Sex and the City" co-star, CHRIS NOTH, became a daddy on Friday. We have her happy reaction to the news!

"I'm thrilled for him because I think first of all he's going to make a wonderful, wonderful father," she told our KEVIN FRAZIER at the Sundance Film Festival. "He found a lovely lady to have a child with. It's the perfect time for him and I think he's very ready."

Sarah and her hubby, MATTHEW BRODERICK, who have a son, were in Park City, Utah, promoting her new romantic comedy, 'Smart People,' with DENNIS QUAID and THOMAS HADEN CHURCH ('Sideways').