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Udhayan is an Indian Tamil film director, based in Chennai, India.

His birth name is S. B. Ramadoss. Born in Perunali village at Ramanathapuram District. His elder brother Sivaram Gandhi is a dialogue writer who worked in films like Samundi (1992), Vandicholai Chinraasu (1994) and Anantha Poongatre (1999).

Udhayan has directed two Tamil action films Perarasu (2006) and Aayudham Seivom (2008). Together with director Sundar C he has written screenplays for Aranmanai, Aambala, Aranmanai 2 and Aranmanai 4. He has been written dialogues for the film Ajith From Aruppukottai.^[1]

Year	Film	Director	Screenwriter	Dialogue writer	Notes
2006	Perarasu	Y	Y	Y	Credited as Udhayan
2008	Aayudham Seivom	Y	Y	Y	Credited as Udhayan
2014	Aranmanai	N	Y	N	Credited as S. B. Ramadoss
2015	Aambala	N	Y	N	Credited as S. B. Ramadoss
2016	Aranmanai 2	N	Y	N	Credited as S. B. Ramadoss
2019	Ajith From Aruppukottai	N	N	Y	Credited as S. B. Ramadoss

• Udhayan at IMDb

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