Zareen Khan, who made her debut in 2010 film 'Veer', has said she couldn't believe that she was working with Salman Khan in the film. "I used to keep staring at him all the time as I couldn't believe it was real," she added. Zareen also worked with Salman in 2011 film 'Ready', which featured Asin Thottumkal and Paresh Rawal.