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Mariska Hargitay and her husband, Peter Hermann, are the proud parents of a baby girl.

"The couple are overjoyed by the wonder of their new daughter,” Hargitay's rep, Leslie Sloane, tells "Her brother, August, is thrilled to have the sister he's always wanted."

The 47-year-old Law and Order: SVU star has named her new daughter Amaya Josephine.

The newborn was adopted from the United States.

"It was a long time coming," a source tells Us.

The couple have been married since August 2004.