is a 2011 Tamil-language film directed by S. K. Dinesh, starring Silambarasan (Simbu), Richa Gangopadhyay, and Sonu Sood. It's an action-comedy-drama, which is a remake of the Hindi film Dabangg .

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Osthi received mixed reviews upon release. Critics praised Ajith’s screen presence and the music composed by Thaman S (tracks like Kummi Adi and Nadukattu were hits), but the film was criticized for being a frame-to-frame copy of the original. However, over the years, the film has gained a niche following specifically for Ajith’s mannerisms, comedies, and the "mass" moments.

: Simbu was praised for his energetic portrayal of "Osthe" Velan, bringing his own style to the character originally played by Salman Khan.

The narrative explores Velan’s deep-rooted animosity toward his stepfather ( Nassar ) and half-brother Balan ( Jithan Ramesh ).