"A lot of scripts came my way after Raanjhanaa. I think I read about 33 scripts but there was nothing solid to back up my first Hindi film. I kept waiting for about eight months when R Balki called. He is like 'if you are free for a couple of hours do drop in'.
After a two-hour narration I knew I was doing it," Dhanush told in an interview. The 31-year-old actor believes Shamitabh is a great opportunity for him to learn from the best.
"It would be my toughest role in my 28 films career. It was mentally very taxing. The character was not easy to play. Hopefully, I have done a convincing job and lived up to the director's expectations and people's expectations if they have any," he said.
Dhanush is sharing the screen space with Amitabh Bachchan and newcomer Akshara Haasan in the film, which is slated to release this Friday. When asked about his biggest challenge while facing the camera for Shamitabh, Dhanush said he just wanted to be able to do justice to Bachchan's voice.
"It was a great opportunity to learn from the best and I tried to absorb as much as possible. I was nervous only because handling the majestic voice of Amit ji is not easy. I was worried whether I will be able to carry his majestic voice in my small frame," Dhanush said.
It is a busy month for the actor, who has a very successful career in Tamil cinema, as he will start promoting his next Tamil film Anegan before beginning the shoot on Maari.