Laura Benanti

The Playboy Club alum Laura Benanti has been cast as Detective Nick Amaro's wife Leanne on Law and Order: Special Victims Unit, TVGuide.com has learned exclusively.

Benanti joins the show when her character returns from overseas and she and Amaro (Danny Pino) must figure out where their relationship stands.

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Benanti, who played the Bunny Mother on the quickly canceled NBC series, will have a three-episode arc. Her first episode, "Spiraling Down," will air in December.