R Madhavan is all set to grace the screen yet again with the highly anticipated biopic, "G.D.N.". Adding to the hype for the forthcoming flick, the makers have unveiled the first look teaser of the film. 

The clip opened with Madhavan as Gopalaswamy Doraiswamy Naidu hard at work in his workshop. His face is initially covered with a welding shield. Later, he removes the shield, and we see Madhavan as Naidu in an aged, bold look with spectacles. Madhavan is hard to recognize in his latest avatar as the `Edison of India`.