Before they split, Ranbir and Deepika were last seen together in 'Bachna Ae Haseeno'.
The film has created quite a buzz from the time it went on floors primarily because of the pairing of Ranbir and Deepika.
"Their dating earlier was not a big deal, they were a couple, there were a lot of controversies later like the 'Koffee with Karan' episode and etc. But today there is nothing like that... They are now good friends and co-stars," Ayan told PTI in an interview here.
The promo of 'Yeh Jawaani Hai Deewani' ends with Deepika's dialogue - 'Mujhe Tumse Pyar Ho Jayega... Phir Se' - to Ranbir.
"A lot has been said about Deepika's line in the promo. There is excitement among the audience and I am happy about it. It was part of the story when I wrote that line. It comes as the part of the scene, it is very natural. There are many points in the film where people will feel they would have been good together," he said.