He's on top of it all, and he's terrific at it," Shweta wrote. It is as simple and as difficult as that. He is never outdated, be it the newest technological fad the Apple watch, for instance or mastering social media.. He's a thinking man's James Bond, without the braggadocio."His popularity has stood the test of time, many smear campaigns, a brief encounter with politics (which he regrets until this day), a near-fatal accident, a greying goatee, and a change of address."He educates himself with what is prevalent, and that's how he remains in touch with the times.Bachchan, 74, took to his blog to share an emotional letter penned by his daughter on his 73rd birthday, in which Shweta describes what it takes to be the "living legend" he is.

And he manages to stay relevant even today, working in an industry that is largely youth-based and capricious."."He harbours none of the disdain age has for youth: he doesn't screw up his nose to the music, art or sartorial sensibilities of the generations that have succeeded him.She went on to appreciate Bachchan's ability to gel around with the younger lot of Bollywood and self tapping screw manufacturers for sale at the same time observe and absorb their energy."Bachchan, who garnered applause for his performance in the recently released film 'Pink', will soon start working on Ram Gopal Varma's 'Sarkar 3'. His arena of work is like a gladiator's pit; it's you against the beasts, and if you manage to end the day alive then glory is yours. Shweta defines the field of acting as "gladiator's pit" and praises her father for surviving with his glory entact. He is a prolific adaptor to changing circumstances.

In fact, he's adjusted himself to find harmony in all of it. He had them enthralled, but the beauty of it was that it was he who went home having learnt the most."My father has done this for four decades.He has the discipline of his generation coupled with the ambition and energy of this one. Read the letter here.She is often asked 'What makes her father Amitabh Bachchan cool ' and Shweta Bachchan-Nanda feels it's the megastar's ability to adapt to the changing times that makes him relevant even for today's generation..The 74-year-old took to his blog to share an emotional letter penned by his daughter on his 73rd birthday."The 'Pink' star has had a dream run for more than four decades in the film industry and is still going strong.He's gone from 'Angry Young Man' to 'Living Legend,' epithets he is shy to accept even in private, even with me."After many hours of agonising over the correct answer to the question 'What makes your father COOL ' it dawns on me that there is no secret formula. I have seen him engage with a room full of young achievers one night, over dinner, at filmmaker Karan Johar's place.