All was not well between the 'Happy Ending' co-stars Saif Ali Khan and Ranvir Shorey. The two had a dispute over a dialogue.

A source tells us that Ranvir was not fully convinced about a certain dialogue and wanted to change it. But Saif felt that there was no need to alter it. And this led to an argument between them.

The source further adds, "Due to their disagreement, the atmosphere was a little tense. Both gave their shots without any interaction off the camera."

Post the pack-up, both the stars calmed down and continued shooting the next day.