R. Sundarrajan initially planned to direct Amman Kovil Kizhakale with Rajinikanth which did not happen. When Sundarrajan met Panchu Arunachalam who was finding plot for a new project with collaboration of S. P. Muthuraman and Rajinikanth, he narrated the plotline of Rajathi Raja which impressed both Rajinikanth and Arunachalam. Rajinikanth insisted Sundarrajan to direct the film who relented after initial rejections to direct the film.[1] The film was produced under Ilaiyaraaja's brother R. D. Bhaskar under their home banner Pavalar Creations.[2] Cinematography was handled by Rajarajan, and editing by B. Lenin and V. T. Vijayan.[3]
Initially, Dhina was selected as the composer, but he was removed and was replaced by comedian Karunas, who made his debut as music director in this film.[12] Paul Jacob, a Sri Lankan composer who composed for films like Thalaimagan and Kizhakku Kadalkarai Salai, was another composer. The lyrics for all songs were written by director Perarasu. The audio was released on 11 May 2009.
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