O'Hara's manager told Playbill.com via email, "Kelli gave birth to a beautiful healthy baby girl early this morning. Mother and baby are doing great."
O'Hara and Naughton are also the parents of Owen James, age four.
The Bridges of Madison County, starring O'Hara and Steven Pasquale — who also co-starred in Far From Heaven — as Francesca and Robert Kincaid, respectively, will officially open on Broadway Feb. 27, 2014, at the Gerald Schoenfeld Theatre, following previews that begin Jan. 13, 2014.
O'Hara, most recently seen on Broadway in a Tony-nominated turn in Nice Work If You Can Get It, has also been Tony-nominated for her work in South Pacific, The Pajama Game and The Light in the Piazza.