Claim: R. Madhavan was in the cast of a movie.

Guru is a 2007 Indian drama film loosely based on the life of Dhirubhai Ambani , a business magnate who founded Reliance Industries . The film was co-written and directed by Mani Ratnam . It stars Abhishek Bachchan , Aishwarya Rai , R. Madhavan , Vidya Balan , Arya Babbar , and Mithun Chakraborty in the leading roles . The film also has Mallika Sherawat in a guest appearance . The score and soundtrack for the film was composed by A. R. Rahman . The film was dubbed and released simultaneously in Tamil as Guru and in Telugu as Gurukanth . In the Tamil version of the film , the lead role -LRB- Abhishek Bachchan -RRB- was dubbed by Suriya . The film was released on 12 January 2007 with its première at the Elgin Theatre in Toronto , Canada , on Thursday 11 January 2007 , making it the first Indian film to have a mainstream international première in Canada . The film was premiered in the Tous Les Cinemas du Monde -LRB- World Cinema -RRB- section of 2007 Cannes Film Festival .