Hilary Duff is SVU's Ashlee Walker

Hilary Duff shoots more scenes in the Harlem neighborhood of New York City on Tuesday afternoon (March 24) for her upcoming guest appearance on Law & Order: SVU.

Regulars Mariska Hargitay and Christopher Meloni were also spotted on set. Duff‘s character Ashlee Walker was explained yesterday.

Mariska, 44, took a nearly three-week absence after undergoing surgery for a partially collapsed lung in early January. She went back into the hospital again on March 3 but returned back to work yesterday.

15+ pictures inside of SVU guest star Hilary Duff…