Sarah Jessica Parker and Matthew Broderick

Sarah Jessica Parker and husband Matthew Broderick welcomed the birth of twin girls via a surrogate mother.

The new additions, Marion Loretta Elwell and Tabitha Hodge, were born on Monday afternoon in Ohio and join big brother James, 6.

"The babies are doing beautifully," Parker's publicist says in a statement to TVGuide.com. "The entire family is over the moon."

Marion Loretta weighed 5 pounds, 11 ounces, while Tabitha was 6 pounds. Hodge and Elwell are family names on Parker's side, the actress' rep said. 

Earlier this year, Parker, 44, and Broderick, 47, had confirmed they were expecting twin daughters by a surrogate mother who became the target of a media frenzy.

Two Ohio police chiefs are being investigated on allegations that they burglarized the surrogate mother's home so they could sell photos and other information to a tabloid, a Harrison County prosecutor said. Both police chiefs have said they are innocent and are cooperating with the investigation.