Imtiaz Ali initially considered casting Kareena Kapoor Khan as the heroine in ‘Rockstar’, but Nargis Fakhri eventually played the role. Ranbir Kapoor expressed regret over not being able to act with Kareena, his cousin. He hoped for future collaborations with Kareena as characters not romantically involved. Entertainment News, Celebrity News, Latest Movie News, Breaking News | Entertainment – Times of India 

 – Source Times of India