Credit: Charles Eshelman/FilmMagic

Special Cuties Unit!

Proud mama Mariska Hargitay stepped out with newly adopted daughter Amaya Josephine in New York City Wednesday afternoon.

The Law & Order SVU star, 47, husband Peter Hermann and their son August, 4, took the bundled-up babe for a stroll near their Manhattan apartment building.

"This is a dream finally realized," a source told late Wednesday of Hargitay's now expanded brood. Adds the star's rep Leslie Sloane, "August is thrilled to have the sister he's always wanted."