Mumbai, Dec 20 (IANS): 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.