It looks like Ranbir Kapoor is Imtiaz Ali's favourite boy. The director had teamed up with the Kapoor scion for 'Rockstar' and the more-recent 'Tamasha'. If sources are to be believed then his next film will star Ranbir yet again.
A DNA report quoted a source as saying, "Ranbir with Katrina or Deepika has become a predictable pairing. He has never cared who his heroine was. In fact, in Rockstar, Imtiaz cast a completely out-of-depth Nargis Fakhri with Ranbir. Now, his next will feature Ranbir with Alia for the first time.”
Incidentally the two are also working together in Ayan Mukherji's superhero film. Currently Ranbir is shooting for 'Ae Dil Hai Mushkil'. On the other hand Alia will start filming for Gauri Shinde's untitled film with Shah Rukh Khan in mid January 2016.