Mariska Hargitay adopts a baby girl

(CBS) Mariska Hargitay and her husband, actor Peter Hermann, have adopted a baby girl.

Amaya Josephine was born about a week ago and is from the United States, the The "Law & Order: SVU" star told People magazine on Wednesday.

Pictures: Celebrity babies
Pictures: Mariska Hargitay

"I'm deliriously happy," Hargitay, 47, told the magazine. "From the minute she was born, she was just surprisingly alert and so full of love."

"We were considering both international and domestic adoption and we're thrilled that this is the way our prayers were answered," she added. "We talked a lot about mixed-race adoptions, and we are very excited that we are now a multi-racial family. We're just so happy she's here."

The couple also has a 4-year-old son, August. Hargitay said he is "over the moon" about being a big brother.