Koi... Mil Gaya

Scientist Sanjay Mehra (Rakesh Roshan) creates a computer from which he sends variations of the syllable om into space, hoping to attract extraterrestrial life. When he believes he has finally received a response, the scientific community mocks him. While driving home, an alien spacecraft appears overhead. Distracted, Sanjay drives off the road, causing the car to explode, killing him. His pregnant wife Sonia (Rekha) survives and returns home to India. When their son Rohit Mehra (Hrithik Roshan) is born, he is mentally disabled due to an injury he received in the accident while a fetus. Sonia learns that although surgery is the only solution to Rohit's disability, but it could result in paralysis or death. Not wanting to lose her only remaining relative, she raises him in the town of Kasauli, where he grows up to be a man of limited intellect.

Nisha Malhotra (Preity Zinta), a young lady comes to Kasauli and is initially antagonistic to Rohit due to his childish pranks against her. This causes her friend, Raj (Rajat Bedi), and his buddies to attack Rohit and break his scooter. Rohit's mother chastises Nisha and Raj for assaulting Rohit. Realizing her mistake, Nisha gifts Rohit a new bike and introduces him to her parents, who are also sympathetic.

Rohit and Nisha, now good friends, find Sanjay's old 'Om' computer and Rohit inadvertently summons the aliens. The visiting aliens leave in haste, leaving one behind. Rohit, Nisha and Rohit's young friends find and befriend the alien, naming him Jadoo ("Magic") and discover his psychokinetic abilities. Raj does not like Nisha's friendship with Rohit so bullies him and spreads a fake rumor that he and Nisha are getting married. This upsets Nisha and Rohit, who is especially hurt as he was under the impression that Nisha was his girlfriend.

Jadoo discovers that Rohit is mentally abnormal and uses his powers, derived from sunlight, to enhance Rohit's mind. The next morning, Rohit finds himself with a clear vision; he later solves a 10th standard mathematics problem, surprising his mathematics teacher and principal. He later lectures his computer teacher for insulting him and to understand the responsibilities of being a teacher. As a result, Rohit finds himself accepted by most of the school.

Rohit's physical abilities are also increased to superhuman levels. Later, Raj challenges Rohit and his friends to a basketball match. Rohit uses his new physique to score several baskets during the match so Raj and his gang begin to play dirty to win the game. After the sun comes out, Jadoo helps Rohit and his young friends to win the game. The now changed Rohit meets Nisha and her parents and confesses his love for her, which Nisha now reciprocates.

Raj and his friends later corner Rohit's friends over their supernatural performance at the basketball game. Rohit's friends are forced to flee and Jadoo accidentally falls from their grasp. Inspector Sukhwani, (Johnny Lever) sees Jadoo in the bag and informs the authorities. The policemen capture the bag, although Rohit arrives in time to rescue Jadoo. He is later confronted by Raj and his buddies. Rohit, now infuriated, easily takes down Raj and his buddies but not before the police catch up to him. It is then revealed that Jadoo was not in the bag and had escaped when Sukhwani was busy calling the Police.

However, the police are suspicious of Rohit and confront him at his house. They take Jadoo and knock Rohit out. When he regains consciousness, Rohit uses his super-speed to catch up to the police cars and arrives just in time to save Jadoo from being taken to America. The spaceship, which he had summoned with his father's computer beforehand, arrives back and Rohit bids a sad farewell to Jadoo. As Jadoo leaves, Rohit loses his powers and reverts to his disabled self. This saves him from prosecution by the Indian government who felicitate him for his actions.

After everything dies down, Raj and his buddies return to harass Rohit and challenge him to kick a ball to them. An enraged Rohit kicks the ball into the bully's face as Jadoo returns Rohit's powers permanently. Rohit and Nisha thank Jadoo and gets married. Nisha gives birth to Rohit's son - Krishna Mehra and lived a peaceful life thereafter.

• Hrithik Roshan as Rohit Mehra
• Preity Zinta as Nisha Malhotra.
• Rekha as Sonia Mehra
• Prem Chopra as Harbans Saxena
• Rajat Bedi as Raj Saxena
• Rajeev Verma as Mr. Malhotra
• Johnny Lever as Chelaram Sukhwani
• Mukesh Rishi as Inspector Khurshid Khan
• Mithilesh Chaturvedi as Mr. Mathur, Rohit's computer teacher
• Rakesh Roshan as Sanjay Mehra
• Akash Khurana as Rohit's Catholic school principal
• Beena Banerjee as Indu
• Anuj Pandit Sharma as Bittu (Super Six)[7]
• Hansika Motwani as Priya (Super Six)
• Pranita Bishnoi as Rohit's Friends (Super Six)
• Indra Vardhan Purohit as Jaadoo (uncredited)

Hrithik lost weight for his role. Koi Mil Gaya was shot in Kasauli, Nanital, Bhimtal and in Canada.[8] The popular Alien Jadu of the film was created by animatronic head was wore by a dwarf actor.During filming he was not able to see due to the animatronic head and he relyed on the instructions provided by the director to move.[9] The animatronic head and costume of Alien was created by an Australian artist James Callner.[10][11] Koi Mil Gaya was the first Bollywood film in which animatronics were used.Director Rakesh Roshan used cutting edge CGI and special effects in Koi Mil Gaya that was never done before in Bollywood and It was first sci-fi film of Hindi cinema.[12][13] Hrithik told in an interview that many people asked him not to do Koi Mil Gaya.He further said they said to me ' you are an action star , don't act in such type of films'. But Hrithik said I heard my heart.[14] Initially, Aishwarya Rai was offered the role of Nisha. After she declined, the role went to Zinta.[15]

The film's soundtrack was first released in June 2003 by Saregama.[16] The music was composed by Rajesh Roshan, and the lyrics were by Dev Kohli. According to the Indian trade website Box Office India, with around 21,00,000 units sold, the film's soundtrack album was the year's fourth highest-selling.[17]

Koi... Mil Gaya received positive reviews from critics and was declared a "blockbuster" by Indian Box office. According to Rotten Tomatoes, the film received 75% 'Certified Fresh'.[18] Taran Adarsh of Bollywood Hungama noted, "Hrithik Roshan dominates the show and packs in a power-pack performance. The role of a mentally challenged person is no cakewalk, but the actor takes to it like a fish takes to water. He manages to pull off the zero to hero routine exceptionally well. As an actor, he scales dizzier heights with this splendid performance". Udita Jhunjhunwala of Mid Day wrote of the film, "You walk into Koi... Mil Gaya expecting to find a mysterious alien, what youend up discovering is a child inside you." She further praised Roshan for his performance in "his bravest role".[19]

• Science fiction films in India

• Koi... Mil Gaya on IMDb
• Koi... Mil Gaya at Rotten Tomatoes
• Koi... Mil Gaya at Box Office Mojo