Dhanush stepped foot in the Tamil film industry with his father Kasthuri Raja's Thulluvadho Ilamai. But, it was his second film, Kadhal Kondein, directed by his elder brother Selvaraghavan, that made the industry notice him as a bankable actor. Kadhal Kondein completed 17 years of release today and Dhanush took to Twitter to reminisce old times. The poster bears the …