The "Cougar Town" star and former "Dawson's Creek' cast member married screenwriter Marc Silverstein in 2007. They are also the parents of a 4-year-old daughter named Birdie.
"I can confirm she gave birth to a baby girl on July 2 who weighed 8.5 pounds," the actress' representative told UsMagazine.com Wednesday. "Everyone is healthy and happy."
"So this happened," Philipps said in a Twitter message she posted alongside a black-and-white picture of herself holding her newborn daughter.
The child's name has not been announced yet.