After getting inked, he posted his photograph on Twitter and urged his followers to do the same.
"I just voted. Have you? Be serious, get off your a** and go vote," he tweeted.
Filmmaker Karan Johar, who gave the young actor a break in the acting industry, shared Varun's swimwear shot on Twitter and wished him: "Happy birthday Varun."
"Happy birthday. May god bless you now and forever! Sending a big birthday hug and kiss to you all the way from Budapest! Love you kid," she posted.
Actress Bipasha Basu also wished the "hero".
"Happy birthday Varun. Enjoy hero! Hugs," she posted on Twitter.