Once Upon A Time In Mumbaai is a 2010 Indian period gangster film directed by Milan Luthria and produced by Ekta Kapoor. It stars Ajay Devgan, Emraan Hashmi, Prachi Desai, and Kangna Ranaut. The film, produced by Balaji Telefilms, was released on 30 July 2010 and received positive reviews from critics, becoming a hit at the box office.