Southern actor Siddharth, who made his Bollywood debut with "Rang De Basanti", is working in David Dhawan's untitled project and says he is having a ball while shooting for the movie.

"Having the best time on David Dhawan's shoot. I feel 10 years younger just because of all the laughter..wonderful gang. Great moments of fun, " the 32-year-old posted on Twitter.

Siddharth's last Hindi movie was Chandan Arora's "Striker" in the year 2010.