Bollywood superstar Shah Rukh Khan, who has been entertaining fans with his versatile roles in films for over two decades now, says there is no specific `formula` to be an actor. He feels one never learns acting `till you die`.

In a live interaction with his fans on Twitter, the 50-year-old, whose latest film `Dilwale` raked in Rs.21 crore in India on its opening day on Friday, was asked when he will learn acting.

Shah Rukh replied: `You never learn acting till you die. It's not multiples and formulae.`

Also, he feels that being an actor, one should be open to do roles in different genres.

`As an actor or star, I like doing all kind of genres,` he said.

The `Chennai Express` star, who is fondly called Badshah and King Khan by his fans, says that during his childhood days his parents never thought of giving him a nickname.


`My parents never gave me a nickname. Maybe, they knew I will get so many when I grow up. So like them all," he tweeted.

When asked by a fan as to why his lectures at various prestigious institutes including University of Edinburgh don't conform to the standards of excellence in his films, Shah Rukh said: `My lectures are to motivate, my films are for entertainment. The mix of the two happens seldom.`

`Dilwale`, which released on Friday, also features Kajol, Varun Dhawan and Kriti Sanon, among others.