Hilary Duff is set for guest stint on Law & Order: Special Victims Unit!

In a storyline that mirrors the 2008 disappearance and death of Florida toddler Caylee Anthony, the former Lizzie McGuire star will take on the role of Ashlee Walker, a hard partying young mother whose daughter mysteriously goes missing. Small screen vet Gail O’Grady (Desperate Housewives, American Dreams) will step in as Hil’s mom, a detemined grandma who fears something sinister has befallen the little girl.

Filming starts this week, the TV Fanatic reports.