Amy Morton is an American actress best known for her work in theatre. A member of Steppenwolf Theater's core group of actors since 1997, Morton has spent most of her career working in the Chicago theater scene. She made her Broadway debut starring opposite Gary Sinise as Nurse Ratched in the Tony Award winning 2001 revival of One Flew Over the Cuckoo's Nest. She originated the role of Barbara in both the original Chicago production and the original Broadway production of Tracy Letts' August: Osage County. For her portrayal she was nominated for both a Tony Award and a Drama Desk Award. Morton reprised the role in the Fall 2008 London production at the National Theatre.
Morton has appeared in such films as Up in the Air, Rookie of the Year, Straight Talk, and 8mm, and television programs like The Equalizer and Crime Story, among others. In 2013 she was introduced as Erin Reagan's new boss, Amanda Harris, on the CBS television drama Blue Bloods.