Actors Aishwarya Rai Bachchan and Randeep Hooda recently launched the much anticipated trailer of their film 'Sarbjit' along with the other cast and crew in Mumbai. Aishwarya, who is playing Dalbir, the sister of Sarabjit Singh in the film revealed that she never met the real-life Dalbir Kaur to prepare for her intense role in the film.