Elizabeth Marvel is an American actress. She made her debut on television in the late ’90s. In the 2000s, she achieved mainstream recognition courtesy of her role as Det. Nancy Parras on The District. She played the role from 2000 to 2004. Meanwhile, she made her film debut in 2000’s Ten Hundred Kings. In the 2010s, she became known for her roles as Ginny Flynn on Nurse Jackie, Margaret Leary on Lights Out, Rita Calhoun on Law & Order: Special Victims Unit, and as Alicia Corwin on Person of Interest. She later played Heather Dunbar on House of Cards and Constance Heck on Fargo. As of 2017, she plays President Elizabeth Keane on the Showtime series Homeland.