Filmmaker Rakesh Roshan says the idea of making Koi…Mil Gaya, a sci-fi movie for children and family audiences, came to him from his granddaughter who used to be a fan of an animation show featuring an alien.. Koi… Mil Gaya revolved around a developmentally disabled young man Rohit Mehra (Hrithik Roshan) and his chance encounter with an alien called Jaadoo, who gives him new powers.The movie was released on August 8, 2003, and became a box-office success.