While an undergraduate student at NYU, Erbe was cast as Lynn Redgrave's daughter on the sitcom Chicken Soup.
While starring in Law and Order: CI, Kathryn appeared in 2 of NBC's The More You Know public service announcements. Her topics were anti-prejudice and the environment.
Kathryn and Law & Order: Criminal Intent co-star Vincent D'Onofrio (Det. Robert Goren) were both guest stars on Homicide: Life on the Street in episodes that aired a week apart.
Kathryn is one of five cast members of Oz to later appear in the Law & Order series. The other four are Law & Order: Special Victims Unit's Christopher Meloni (Det. Elliot Stabler) and B.D. Wong (Dr. George Huang), Law & Order's J.K. Simmons (Dr. Emil Skoda), and Law & Order: Trial By Jury's Kirk Acevedo (D.A. Investigator Hector Salazar).
Kathryn's 2003 pregnancy was written into the script of Law & Order: Criminal Intent, making her character Det. Alexandra Eames a surrogate mother for her sister.
Kathryn is 5'2" (1.57 m).
Kathryn's nickname is Katie.
Kathryn was nominated for a Tony in 1991 for her role in The Speed of Darkness.
Kathryn is a member of Chicago's Steppenwolf Theatre Company.
Kathryn is a 1990 graduate of New York University's Tisch School of the Arts.
Kathryn and husband, actor Terry Kinney, have two children: daughter Maeve, born in 1996, and son Carson, born October 15, 2003.
Kathryn Erbe: It (Law & Order:CI) takes up my whole life, really. I have a lot of heartache not being home for bedtime with my daughter, not getting to see my husband as much as I want. And not having any brain cells to sort of keep things going on the level I would like at home.