Actor Nawazuddin Siddiqui says he is `truly amazed` by megastar Amitabh Bachchan's performance in the upcoming film `TE3N` and feels this is the reason why he is called `the best`.

Nawazuddin, who will be seen alongside Amitabh and Vidya Balan in the Ribhu Dasgupta directorial, took to Twitter on Thursday to share his experience of working with the `Piku` actor.

`Truly amazed by the character played by #SrBachchan in #Te3n. This is the reason we regard you as the best#respect #motivation,` Nawazuddin, best known for his roles in films like `Gangs of Wasseypur`, `The Lunchbox`, `Kick` and `Manjhi - The Mountain Man`, said in a statement.

Produced by Sujoy Ghosh, the film is currently being shot in Kolkata.