<Tr> <Th> Budget </Th> <Td> ₹ 380 million ($8.3 million) </Td> </Tr> <Tr> <Th> Box office </Th> <Td> ₹ 852 million ($19 million) </Td> </Tr> <P> Once Upon a Time in Mumbaai is a 2010 Indian gangster film written by Rajat Arora, directed by Milan Luthria and produced by Ekta Kapoor . It stars Ajay Devgn, Emraan Hashmi, Kangana Ranaut, Prachi Desai and Randeep Hooda . The film is produced under Balaji Motion Pictures and released on 30 July 2010 . Once Upon A Time in Mumbaai received generally positive reviews from critics and was a box office success . The film is loosely based on the lives of Mumbai underworld gangsters Haji Mastan and Dawood Ibrahim . </P> <P> Its sequel, Once Upon a Time in Mumbai Dobaara! was released on 15 August 2013 . It featured Akshay Kumar replacing Hashmi from the first film alongside Imran Khan . The filming for the sequel began in August 2012 apparently in Qatar . The sequel received negative reviews from both critics and audiences and performed poorly at the box office . </P>

Once upon a time in mumbaai based on whose story