"Koi... Mil Gaya" is a 2003 Indian science fiction film directed by Rakesh Roshan. The story revolves around a developmentally challenged young man named Rohit, who discovers an alien named Jadoo after a series of events involving a scientific experiment. The film explores themes of friendship, love, and the impact of kindness. The film features Hrithik Roshan as Rohit and Preity Zinta as his love interest, Sonia. "Koi... Mil Gaya" was well-received for its special effects and engaging storyline, leading to a successful franchise that includes sequels like "Krrish" and "Krrish 3."