The great friendship between Saif Ali Khan and Rani Mukherjee is on the rocks.

Rani and Saif were busy shooting for Siddharth Raj Anand's 'Tara Rum Pum' in New York when they had a spat on the sets of the film. The incident took an ugly turn when both stars asked producer Yash Chopra for separate hotels so that they do not have to see much of each other outside the sets.