Asin is starring opposite Vijay in the film and actors Raj Kiran and Roja enacting her parent"s role. Vadivelu will take care of hilarious quotients (his role was performed by director Siddique himself in original version).
The film was shot recnetly at VIT College in Vellore amidst of 5000 students and the final schedule is being filmed at Kerala and European Countries. At first, Vijay had plans about completing this film and his other project Velayudham. As the actor has signed couple of other films, which includes untitled sci-fi thriller with Vikram Kumar and Shankar"s remake of 3 Idiots, he has been simultaneously shooting for Kaavalan and Velayudham so as to commence the other projects by the beginning of 2011.
Now, it looks like the release of Kaavalan may be postponed to December and if closer sources are to be believed, then producer-filmmaker Sakthi Chidambaram has acquired the rights of this film.