Emily Ratajkowski is an actress.
Emily O'Hara Ratajkowski ( [ ˌrɑːtaɪˈkɒfski ] born June 7 , 1991 ) is an American actress and model . Her feature film debut was as the mistress of Ben Affleck 's character in the 2014 film Gone Girl . We Are Your Friends (film) . The film stars Zac Efron , Emily Ratajkowski and Wes Bentley , and follows a young Los Angeles DJ trying to make it in the music industry and figure out life with his friends .