Rakesh Roshan had approached Bachchan to introduce crucial parts of the film.
In the movie, Bachchan will introduce Vivek Oberoi's character and also explain the sequence of events that connect the two earlier films of the franchise 'Krrish 3'.
"Amitabh Bachchan said yes to doing a voiceover of the film and his narration is important because it creates a connect between the three films and introduces the villain," Rakesh Roshan said.
'Krrish 3' also stars Hrithik Roshan, Priyanka Chopra, Kangana Ranaut.