The remaining members of the cast were selected after the launch, which was held on 13 April 2007. Despite early reports of Prakash Raj playing the role enacted by K. Balaji of an inspector in the original, the role was eventually secured by Prabhu Ganesan. The role of the comedian was tipped to go Vadivelu, after he received rave reviews for his comic chemistry in "Chandramukhi" with Rajinikanth. However, despite the reviews, Vishnuvardhan's regular pattern meant that the spotlight for a comedian would be limited. Santhanam replaced him. Another character artiste, Adithya, also signed up to be one of the members of the police troupe, as did Malayalam actor Rahman, who with "Billa" made his comeback into Tamil cinema. The item number danced by Helen in the original was originally given to Mumaith Khan, but was later changed to newcomer Rose Dawn, for unknown reasons.