Emily Kathleen Anne Mortimer (born 1 December 1971) is an English actress and screenwriter. She began acting in stage productions and has since appeared in several film and television roles. In 2003, she won an Independent Spirit Award for her performance in Lovely and Amazing. She is also known for playing the role of Mackenzie McHale in the HBO series The Newsroom, and as the voice actress of Sophie in the English-language version of Howl's Moving Castle (2004). Mortimer also stars in Scream 3 (2000), Match Point (2005), Lars and the Real Girl (2007), Chaos Theory (2008), Harry Brown (2009), Shutter Island (2010), Hugo (2011), and Mary Poppins Returns (2018).