Thalapathy Vijay's 'Mersal' is currently in its post-production stages and the makers are working round-the-clock to release it on Diwali. Lead heroine in the film Samantha took to her Instagram to announce that she has begun dubbing for the film. Music for 'Mersal' has been rendered by ace maestro AR Rahman. The teaser and songs have become a massive hit, with 'Aalaporaam Tamizhan' topping the charts. Also, rappers ADK and SriRascol will be working on the background score of the movie. Vijay had already finished his dubbing for the film.