Actress Mariska Hargitay has adopted a baby boy.

The Law & Order: Special Victims Unit star and her husband Peter Hermann brought home Andrew Nicolas just six months after adopting daughter Amaya.

Hargitay tells People magazine, "We knew we wanted to have more children. We thought, 'We should start planning now, since it will take a while.' We never in a million years thought it would happen this quickly, but something inside of us knew that that was right, and we said yes, yes, yes! We're pinching ourselves. We're just taking in this blessing."

And the actress reveals the two children have fast become friends, adding: "They'll lie in the crib together, and she'll hold his hand and put her arm around him. She's already so protective of him."

The couple already has a five-year-old son, August, who is "over the moon" about having a baby brother, and Hargitay admits she and Hermann are happily enjoying parenthood.

She adds, "There's so much adjusting, but we feel oddly settled now. It feels like everyone is home. Our family is complete now. This is what we had in store for us."