After the critical acclaim for "Love Sex Aur Dhokha", Ekta Kapoor is now ready to release the Ajay Devgn starrer "Once Upon A Time In Mumbaai" July 30.

Directed by Milan Luthria, the film will trace the changing face of the Mumbai underworld through the eyes of a police officer. It also stars Emraan Hashmi, Kangana Ranaut and Prachi Desai.

Set primarily in 1970 Mumbai, the film follows the rise of Sultan (Ajay), and his eventual fall when his protege Shoaib (Emraan) challenges his supremacy and usurps power to rule the underworld in the city, said a press statement.