Located in Mumbai, Bollywood is the largest centre of film production in India and one of the largest in the world. While Bollywood specialty lies with Hindi movies, regional production centres cater for different language groups (e.g. Telugu movie industry).
Bollywood commercial movies are usually three-hour-long musicals. Few of them are made without at least one song-and-dance number. Plots have a tendency to be melodramatic (featuring love triangles, family tragedies, dramatic reversals, sacrifice, manipulative villains, etc.) but may also include comedy, action and suspense.