South superstar Nagarjuna has revealed that his admiration for Amitabh Bachchan stems from the Bollywood veteran's energy and passion for work. The 53-year-old south star, who had worked with Bachchan 20 years back in 'Khuda Gawaah', said that Amit ji's energy still inspires him. "With Mr. Bachchan it's always a learning experience. I have shot with him in 'Khuda Gawaha' long time ago and I am still in awe of him. We shot another kalian add 6 months ago," he said.

"It had turned out very nice. Infact I was thinking looking at him that how does he do it after all these years with the same energy, same fire in his eyes and the same passion towards acting and there is a lot of thing which we all can learn from him," he added. Both the mega actors were spotted shooting for Kalyan Jewelers ad commercial in Mumbai.