The 44-year-old actress, who is the daughter of "Goodfellas" star Paul Sorvino, gave birth to daughter Lucia, reported People magazine.
"We are thrilled beyond measure to have been blessed with our fourth precious, healthy child," a statement issued by Sorvino and her actor husband Christopher Backus read.
The couple wed in 2004 and also has seven-year-old daughter Mattea and sons Johnny, five, and Holden, two.