Nell Marie McKay (born 13 April 1982 in London) is a British-American singer and songwriter. She made her Broadway debut in The Threepenny Opera (2006). McKay is hard to categorize. She’s done Brecht on Broadway, opened for Lou Reed at Carnegie Hall, sung Woody Allen movie songs at the Hollywood Bowl, performed on A Prairie Home Companion, duetted with Eartha Kitt and Triumph The Insult Comic Dog, played Hilary Swank’s sister on the big screen, paid tribute to Doris Day, and released four wildly acclaimed albums of original music.