Amitabh Bachchan wrote a personalised letter for this actor's mother recovering from heart attack: 'He is unbelievable'

Talking about Amitabh Bachchan, Ashish Vidyarthi said, "He is unbelievable; he is always on time and never makes anyone feel uncomfortable. Never opposes the director if they want to take another shot. You can learn so much by just looking at him."