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.
Clarke was born in St. Louis, Missouri, the daughter of Ernest Clarke, an engineer, and Carolyn, a homemaker.
She attended John Burroughs School in St. Louis, Missouri (along with Mad Men star Jon Hamm, who was her prom date), and Indiana University Bloomington, where she studied Fine Arts and Italian. During that time she also dated fellow actor Paul Rudd for a short time. While a student at Indiana University, Clarke became a member of the Kappa Alpha Theta sorority. She was initiated into the Beta chapter in 1990.