Isabel Gillies

Isabel Gillies is an actress and author. She played Elliot Stablers wife, Kathy, in Law amp Order Special Victims Unit. Her memoir, Happens Every Day, was a New York Times bestseller, and her most recent book is the young adult novel Starry Night.

Prior to her role as Kathy Stabler on SVU, which she played from 1999 to 2011, Gillies appeared in Bad Girl, an episode of the original Law amp Order series, playing a young woman who murders an undercover police officer and then undergoes a religious conversion during her trial and is born again. In 2000, she played the role of Alison in the shortlived Fox series, The treet.

Source: Wikipedia