While Mr Bachchan will represent his first Hollywood film The Great Gatsby in Cannes, Rajinikanth will be unveiling the trailer of his new film Kochadaiyaan at the festival.
Murli Manohar, co-producer of the southern film, confirmed Rajinikanth's presence in Cannes at the same time as the Big B.
"It's a big moment in the history of Indian cinema. Rajiniji is as excited as a child about the way Kochadaiyaan has turned out. Technique-wise it takes Indian cinema to another level altogether. Rajiniji has shown the rough cut of the film to his close friends. The other day, AR Rahman saw the rough cut and was blown away," said Manohar.
Kochadaiyaan will be finally completed July 15. The release date is to be decided by the end of May.
Apparently, Rajinikanth, 62, has been advised against long air travel. But he is in no mood to stop himself from making that long journey to Cannes, where the annual movie extravaganza begins on May 15.
A source close to the project said: "He is adamant on going. He has become extremely frail. But whenever anyone mentions his delicate health to Rajiniji, he gives the example of Mr Bachchan, who has braved the most serious illnesses and done exactly what he wanted and gone exactly where he wanted in his career."