Ajay, Kajol at the screening of <i>Once Upon a Time</i>...

Ajay Devgn arrived with his wife Kajol in style in his new BMW Z4 for the special screening of Once Upon A Time In Mumbaai.

According to reports Ajay, who has a fancy for cars, had brought his new BMW Z4 home on July 28 and it was the couple's first outing in their new car.

Kajol's sister Tanishaa arriving for the special screening.

Ajay Devgn has said Once Upon A Time in Mumbaai is a pure work of fiction and was not inspired by any individual's life. The Balaji Telefilms-produced movie faced legal trouble over claims that it was based on the life of alleged smuggler Haji Mastan's life.

Seen here his wife Kajol.

Actress Mona Singh, who was last seen in 2009's superhit flick 3 Idiots, arriving for the special screening.

Kajol, who is pregnant with her second baby, was there to support hubby.

Actor Harman Baweja.

Director Madhur Bhandarkar.

Director Rohit Shetty.

Here's a look at some of the stills from the film.

Stills: <i>Once Upon a Time in Mumbaai</i>

One of the most talked about movie of this year Once Upon a Time in Mumbaai stars Emraan Hashmi, Ajay Devgn, Kangana Ranaut,Prachi Desai and Randeep Hooda.

Ajay Devgn plays the role of Sultan in Once Upon a Time in Mumbaai, who has a lot of power.

Emraan Hashmi plays Shoaib a Dubai based gangster, Sultan's protege who turns out to threaten Sultan's supremacy in Mumbai.

Kangana Ranaut plays the role of a Bollywood diva Rehana in Once Upon a Time in Mumbaai.

Prachi Desai plays the role of Mumtaz, a girl-next-door with innocent, demure looks.

Once Upon a Time in Mumbaai has been directed by Milan Luthria and produced by Balaji Telefims.

Prachi Desai and Emraan Hashmi have been paired opposite each other for the first time on-screen.

Ajay Devgn and Kangana Ranaut too have been paired together for the first time and it is their love story in the film that adds a turning point.

Reports are that Ajay's role in the film is based on late underworld gangster Haji Mastaan and his reign in Mumbai during the 1960's.

And there seem to be a lot of similarities between Emraan Hashmi's look and underworld don Dawood Ibrahim. But filmmakers have decided to keep mum.

Once Upon a Time in Mumbaai shows the relationship between Dawood Ibrahim & Haji Mastan in the 1960's.

Pritam has given the music of Once Upon a Time in Mumbaai and Irshad Kamil has written the lyrics.

The costumes have been designed by Manoshi Nath and Rushi Sharma.

Kangana's look in the movie is very dramatic and bold with winged eyeliner and red lips.

All characters have been given a retro look to match the time period.

Prachi does a Bobby in the movie by sporting a polka dot top and mini skirt.

Emraan Hashmi and Prachi have done a steamy scene in the movie.

Once Upon a Time in Mumbaai also stars Randeep Hooda

Still from the movie.

Ajay, Kajol at the screening of Once Upon a Time...

Ajay Devgn hosted a special screening of his much-talked about film Once Upon a Time In Mumbaai. A host of stars including his wife Kajol were also present.