The producer-director explains the many permutations and combinations that keep happening due to the last names shared by the people in his office

At the first-look launch of his film, newbie Siddharth Malhotra was mistakenly called Karan Malhotra by someone

Producer Karan Johar replied, `We have a unique trend in our office. I'm Karan Johar, I already have a director called Karan Malhotra. I have a director called Siddharth Malhotra and we also have an actor by the name of Siddharth Malhotra!

So a lot of permutations and combinations keep on happening with our names.`