|Produced by||P. Karthikeyan|
|Edited by||Suresh Urs|
|Distributed by||Vijayam Cine Combines|
Attahasam (English: Defiance) is a 2004 Tamil film directed by Saran featuring Ajith Kumar in dual lead roles with Pooja playing the female lead. Sujatha, Karunas and Ramesh Khanna play pivotal roles in the film, while the score and soundtrack are composed by Bharathwaj the film became blockbuster hit on his career 
The movie begins with Ajith, a driving instructor leading a happy life with his mother Sujatha. She hides from him the truth that his father, Nizhalgal Ravi, was murdered by a dadha, Babu Anthony. The mother much against the boy’s wish packs off Ajith’s twin brother with a family who offer to adopt him, who had been witness to the murderer from a close quarter, to a distant town. He escapes from the family and goes to Tuticorin and grows to become a gangster there.
When the younger Ajith visits Tuticorin, he comes across his elder brother. Seizing the opportunity, the elder brother kidnaps the younger one and decides to go as the driving instructor to Chennai. Initially, he plans to take revenge on his mother for packing him off from their house at a very young age. He hurts her at every step and even plans to sell off all their property.
On the other hand, the younger Ajith is mistaken as the gangster and is subject to attacks by the local gangsters of Tuticorin. Younger Ajith escapes from them and returns to Chennai to save his mother. In the meantime Older Ajith comes to know about his father's death and that Babu Antony was the cause for the same. He avenges his father's death and leaves younger Ajith with his mother to live happily and goes off to jail to keep his mother in belief that he is somewhere in the world living happily.
- Ajith Kumar as Guru(Thala) and Jeeva
- Pooja as Swapna
- Sujatha as Guru's and Jeeva's Mother
- Nizhalgal Ravi as Guru's and Jeeva's Father
- Cochin Hanifa as Swapna's Father
- Jasper as Fernandez
- Babu Antony as Manthiram
- Mahadevan as Samutrakani
- Ramesh Khanna as Surula
- Karunas as Pangu
- Vaiyapuri as Kumbudren Saamy
- Manobala as Semi Joseph
- M. S. Bhaskar as Sex Doctor
Saran and Ajith collaborated for the third time after the successes of Kadhal Mannan (1998) and Amarkalam (1999). Between then and 2004, the pair began shooting for another project for Poornachandra Rao titled Erumugam also starring Richa Pallod, before Ajith pulled out and the pair subsequently fell out. However Ajith Kumar's wife played a role in reconciling the pair and Saran worked on a fresh script for the actor. Kiran was initially roped in to play a second leading female role after her other film opposite Ajith, Mahaa, was shelved but Saran later deleted her character from the project.
The shooting progressed in October 2004 around Tuticorin and a scene created a ruckus among the public as they mistook the action to be real, as the region had seen similar daylight murders and fights among local mafia in the past. Songs from the film were expected to be shot in Romania but were later canned in Pollachi. The film released on Diwali 2004 to make most of the holiday season and became a super hit 
|Soundtrack album by Bharathwaj|
|Genre||Feature film soundtrack|
|1.||"Therkku Cheemayile "||Mano||4:42|
|2.||"Pollachi Ilaneere"||Karthik , Anuradha Sriram||4:04|
|3.||"Nachendru Inchendru"||Srinivas, Ujaini||4:25|
|5.||"Thala Pola Varuma"||Bharathwaj, Donnan, Arjun||3:39|
|6.||"Attahasam"||Tippu, Donnan, Arjun , Bharathwaj||3:46|
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