The actress – who plays Dr. Temperance Brennan in the crime series – has welcomed a second son with husband David Hornsby.
A rep confirmed the new arrival but declined to give any details such as date of birth, name or weight.
Emily and David are also parents to son Henry, three.
Actress Emily, 38, is best known for her role opposite David Boreanaz in Bones, which is the TV show inspired by Kathy Reichs' Temperance Brennan forensic anthropology books.
Her pregnancy happened at the same time as little sister Zooey, who is expecting her first childwith boyfriend Jacob Pechenik.
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