Katrina Kaif has been preparing extremely hard for her character in debutant Ali Abbas Zafar's Mere Brother Ki Dulhan.

The Yash Raj film with Imran Khan has her essay a headstrong, self-opinionated girl.

Kats has had to step outside her comfort zone to play the role! Buzz is that the star has modelled herself on someone she is familiar with in the industry.

But she will not divulge who she is observing for the role. No prizes for guessing who the actress has observed at close quarters to just do whatever she pleases. And not worry about anything else!