Since 2005, Harris has appeared in various stage productions across the United States. In summer 2006, she appeared as "Vera Charles" in the Kennedy Center's production of "Mame" opposite Christine Baranski in the title role. In early 2007, Harris appeared as Amanda Wingfield in the production of "The Glass Menagerie" at the Guthrie Theater. In summer 2007, she appeared on Broadway in the revival of the John Van Druten comedy "Old Acquaintance" as "Mildred Watson Drake" with Margaret Colin at the American Airlines Theatre.