Mere Brother Ki Dulhan is a romantic comedy in the vein of the actress's earlier films such as Aajab Prem Ki Ghazab Kahan.
Kaif told DNA: "I am learning the guitar. For an actor it's really easy to be a rock star.
"Wear some boots, wear some jeans, wear kajal, dishevel your hair, hold a guitar and strum the strings. I can actually hold the guitar right as I know how to play it."
Kaif was recently given a guitar by her co-star Farhan Akhtar in the road movie Zindagi Na Milegi Dobara.
She added of Imran Khan, with whom she stars in Mere Brother Ki Dulhan for the first time: "For Imran and me, it was a very new space. We didn't know each other much and there had to be a fine-tuning, which eventually helped us to get into the characters that we are playing.
"It was a nice first film for both of us to do together."
> Katrina Kaif: 'My relationship with Salman Khan has not changed'
Watch Katrina Kaif in the trailer for Mere Brother Ki Dulhan below: