Bollywood is the informal term popularly used for the Hindi-language film industry based in Mumbai, Maharashtra, India. The term is often incorrectly used to refer to the whole of Indian cinema; it is only a part of the total Indian film industry, which includes several regional film industries sorted by language.[1] Bollywood is the largest film producer in India and one of the largest centers of film production in the world.[2][3][4] Bollywood is formally referred to as Hindi cinema,[5] though frequent use of poetic Urdu words is fairly common. There has been a growing presence of Indian English in dialogue and songs as well. It is common to see films that feature dialogue with English words phrases, or even whole sentences.[6] The name "Bollywood" is derived from Bombay (the former name for Mumbai) and Hollywood, the center of the American film industry.[7] However, unlike Hollywood, Bollywood does not exist as a physical place. Though some deplore the name, arguing that it makes the industry look like a poor cousin to Hollywood,[7][8] it has its own entry in the Oxford English Dictionary. Source: Wikipedia