In film, English-language accents can be part of acting performances. Actors use dialect coaches to speak in an accent other than their own. Accents can vary by locality, socioeconomic status, ethnicity, and other factors. In film, accents are scrutinized by film critics and film audiences alike. Throughout film history, certain actors are known for their accents, and certain accents in individual films have been judged as exceptionally good or bad.