"Once Upon a Time in Mumbaai" is a 2010 Indian film directed by Milan Luthria. The movie is set in the 1970s and revolves around the rise of the underworld in Mumbai. It features the story of two gangsters, Sultan and Vijay, who navigate love, power, and betrayal in their quest for dominance. The film stars Ajay Devgn as Sultan and Emraan Hashmi as Vijay, with Kangana Ranaut playing the female lead. It combines elements of romance and crime, showcasing the glamorous yet dangerous world of organized crime. The film received positive reviews for its performances and music.