Madhavan has lent his support for the Chennai-based charity , The Banyan , and appeared in the charity musical Netru , Indru , Naalai directed by Mani Ratnam for the cause . He appeared as a guest cook and newly launched restaurant in Chennai and cooked dosas for auction for the charity , helping raise forty five thousand rupees . He has been a part of an AIDS awareness programme initiated by Richard Gere in India and helped advertise the '' A Time for Heroes '' campaign appearing in a short film . Similarly Madhavan featured in a four-minute film produced by Agaram Foundation , '' Herova ? Zerova ? '' , campaigning for educational awareness alongside Suriya , Vijay and Jyothika . In 2010 , along with his cast and crew from '' 3 Idiots '' , he helped raise Rs. 2.5 million for the renovation of the school in Leh , which was damaged by flash floods . Madhavan laid bricks and tiles at the London Business School in July 2011 , building a symbolic house to represent the 100,000 houses that will be built in India by 2015 as a part of Habitat for Humanity 's campaign to improve substandard houses in India . During the 2015 South Indian floods , Madhavan worked alongside other Indian actors in coordinating the relief efforts . In 2016 , Lepra India signed him to work as a goodwill ambassador in helping promote action against leprosy
2015 South Indian floods
2015 South Indian floods
R. Madhavan