Ayan Mukerji's fantasy film Brahmastra is one of the most talked about films of this year. A few days earlier, the official logo of the film was released. The film features Ranbir Kapoor, Alia Bhatt, Amitabh Bachchan, Nagarjuna and Mouni Roy. Now Ayan has revealed who was the first person to know about the film, and it is none other than, Ranbir Kapoor. Talking it to his Instagram page, Ayan wrote, "Ranbir - The absolute first person to have heard about Brahmāstra and the first to have jumped on for the ride! On a writing trip for Yeh Jawaani in May 2011, is where the idea was born... and Ranbir was my very first phone call." Ayan also added that he has so much to share about the movie. Check out his post below.