Sarah Clarke (born February 16, 1972) is an American actress, best known for her role as Nina Myers on 24, and also for her roles as Renée Dwyer, Bella Swan's mother, in the 2008 film Twilight, Erin McGuire on the short-lived TV show Trust Me, and CIA Agent Lena Smith on the USA Network show Covert Affairs. She currently stars as Eleanor Wish in Amazon Studios' police procedural drama Bosch.