Kaabil starring Hrithik Roshan as protagonist and the character which he played is a blind man who speaks in many voices. It includes Amitabh Bachchan's voice also and Duggu amazingly copied it.
As per source, “When Hrithik did a voice imitation of Big B, he was so uncannily close to the original that everyone on the sets assumed that sound designer Resul Pookutty had somehow engineered the voiceover."
"Hrithik’s character Rohan Bhatnagar in Kaabil is a blind man who lives a normal life in the city much like many others there and earns by being a dubbing artiste. Apart from Mr Bachchan’s voice, Rohan is seen mimicking other celebrities as well.”
Added the source, “Hrithik and sound designer Resul decided to take up the challenge of making HR do the voice impersonations himself. It’s worked wonderfully.”
Hrithik on this note said, “I guess this is just a reflection of the kind of impact Mr Bachchan has had on my generation, and of course, the fact that hard work equals results.”