Kangana Ranaut is set to step into the shoes of the yesteryear actress and beautiful diva Madhubala for a movie role. Director Milan Luthria 's next film has many characters plucked from real life. Titled Once Upon A Time In Mumbai , the movie tells the story of underworld gangster Haji Mastan in the 1960s. Ajay Devgan will play Mastan while Kangana Ranaut has been roped in to play an actress Mastan was romantically interested in.   read more »