Dagney Michelle Kerr (born February 22, 1972, in Cincinnati, Ohio) an American actress, best known for her roles as Nurse Ruth Ann Heisel on Desperate Housewives and Buffy's demonic roommate Kathy Newman on Buffy the Vampire Slayer. She has also appeared on such shows as The George Lopez Show, E.R., Six Feet Under and The District. Kerr was born in Cincinnati, Ohio. She attended the prestigious Cincinnati School for the Creative and Performing Arts alongside pop-culture alums Carmen Electra and Nick & Drew Lachey. She also apprenticed in the Cincinnati Ballet Company. Before acting, Kerr was a singer and dancer on cruise ships.