The informal term used for the Hindi-language film industry based in Mumbai, in the state of Māhārāṣṭra. It is one of the largest centres of cinematic production in the world. The Bollywood blend of melodrama, comedy and action enjoys a huge following in India and among the diaspora. Typical Bollywood movies are lengthy, colourful musicals featuring song and dance numbers involving large numbers of people, and music is a key ingredient in films’ success.