The once easy camaraderie shared between Katrina Kaif and Ranbir Kapoor on the sets of Ajab Prem Ki Ghazab Kahani seems to be a thing of the past!The sizzling chemistry that Katrina shared with Ranbir sent B-Town into a tizzy with rumours that the on-screen couple may have something going on off-screen too!  The rumours were fueled further by the news of all the ribbing and masti the duo got to on sets.

However, now things are much different. Sources close to the pair swear that Kat and Ranbir only interact for the camera, quite literally, turning their backs to each other once the Director yells 'cut'.The cold war between the two friends seems to have arisen due to the vibes between Ranbir and Priyanka who have reportedly become 'great pals' in the US on the sets of their forthcoming flick, Anjaana Anjaani.

Perhaps this is on account of some Priyanka-Katrina rivalry, as the two have stood atop the list of rising starlets in B-town.Whatever the case, we know this, Salman Khan can finally get a breather stress free!