Lover birds Ranbir Kapoor and Deepika Padukone have ended up having their first major fight since the time, Ranbir proposed Deepika during the Filmfare Awards Nite, earlier this year. The reason for this fight has been Katrina Kaif!

Sources inform, "Deepika had heard from her sources about Ranbir's growing comfortability on and off the sets of Rajkumar Santoshi's Ajab Prem Ki Ghazab Kahani during the two month long shooting schedule in Ooty.

While Deepika never confronted Ranbir over it, she got very insecure when her sources from the sets of the same film reported fresh news about what was happening between the two in the Goa schedule.

It is learnt that during the Goa shoot both Ranbir and Katrina appeared more than comfortable (Vijainder-read physical) with each other than before even in front of the unit members on the sets.

Deepika headed to Goa straightaway after hearing from her source. During her one day trip she met her source and headed back to Mumbai after hearing it all in person.

When Ranbir came to know about it, he called Deepika and they both had a huge argument over the phone which ended up in Deepika hanging up on him. Since that day, Deepika has been avoiding picking up Ranbir's calls."

No we gotta see how Salman Khan reacts to this one! Ranbir calls Salman, Sir on and off the sets since the time they did Saawariya together. Katrina had earlier expressed to us her views on Ranbir as, "A very witty co-star and fun to be with on sets."