Shahid felt that the character of Prem Shankar Sharma is similar to that of Aditya Kashyap that he played in ‘Jab We Met’.So he declined the offer. The director then offered the role to Ranbir.from Entertainment News, Celebrity News, Latest Movie News, Breaking News | Entertainment - Times of India https://timesofindia.indiatimes.com/entertainment/hindi/bollywood/news/did-you-know-that-shahid-kapoor-was-the-first-choice-for-ranbir-kapoors-character-in-ajab-prem-ki-gazab-kahani/articleshow/75838624.cms
via Tamilrockers Review