"Hey guys for the record I don't smoke, but I might have to smoke for some upcoming role but everyone knows smoking is bad so don't do it," Varun, who was seen smoking in his debut film Student Of The Year, posted on Twitter.
"As an actor if you play a character it doesn't mean that I am that person. I know there are a lot of young people here so be healthy no smoking," he added.
However, the actor feels it is not right to judge people because of their smoking habits.
"And for the rest of the grown-ups, behave (in a) mature (way). You guys know this is not reality. Also people who smoke are not bad human beings," he posted on the micro-blogging site.
Varun will soon be seen in father David Dhawan's directorial project Main Tera Hero, the Hindi remake of Telugu movie Kandireega.
Filmmaker Sriram Raghavan has also roped in the actor for an untitled project.