While Mani Ratnam signed up actor Karthik’s elder son Gautham for his next venture – Kadal, his second son has been roped in with none other than Cheran. The actor-producer-director is introducing Gyan – Kathik’s son for his next project. The movie has a city based subject and will speak about younger generation. Cheran himself has written the story and its been restricted only to his own production. Another resource close to it says that there will be three other new faces in the movie. Cheran was looking for a city based boy who will be playing the lead protagonist in the film and kathik’s second son Gyan suited well with the character. Well good luck Gyan!