The post-production work related to Rajinikanth's "Kochadaiyaan" is progressing at a brisk pace.

Oscar winner A R Rahman has been busy with the re-recording work for the film.

The composer is in London, where the film's re-recording work is under progress at AIR Studios. Rahman has been working on a massive soundtrack with renowned score engineer and sound mixer Geoff Foster for "Kochadaiyaan". Geoff is known to have worked in Hollywood films including "Life of Pi" and "The Dark Knight Rises".   

"Geoff Foster, mixing 200 tracks of orchestra for Kochadaiyaan at AIR Studios, London," Rahman had said on his Twitter page.

"Kochadaiyaan" is being promoted as India's first 3D film made in the likes of Hollywood flicks "Avatar" and "The Adventures of Tintin". The superstar has completed his work for the film including dubbing.

Speculations are on the rise in connection with the film's release date. According to latest reports, "Kochadaiyaan" will be a diwali cracker for Rajini's fans. However, an official announcement confirming the date is yet to be made. The makers are reportedly undecided even on the release date of the film's trailer.

There were reports that the trailer would be launched on 9 June. But it turned out to be rumour, with the film's director Soundarya tweeting that any announcement regarding "Kochadaiyaan" would be officially informed by her.

"Hey guys ... I connect with u directly. Any updates about movie I will give u. Pls don't believe rumours. Have a great day !," she tweeted.

Actress Deepika Padukone is making her debut in Tamil with this film. Post the success of her recent release "Yeh Jawaani Hai Deewani", the actress is on a roll.  Two big films, starring the Bollywood lass, are getting lined up for release. While one is "Kochadaiyaan", the other being Shah Rukh Khan's "Chennai Express", in which Deepika will appear as a Tamilian.

Rajini will be seen in a dual role of father and son in "Kochadaiyaan". While the father is Kochadaiyaan (a loyal commander to the emperor), the son is Rana. Actress-cum-dancer Shobana has been paired opposite the father Rajini and Deepika is the leading lady for the younger Rajini.