Hrithik Roshan plays a blind man in Sanjay Gupta directed ‘Kaabil’, and the actor describes the experience as the toughest one! “After ‘Kaabil’, I realized that the characters that I have played in the past are less challenging. This has been one role for which I had to give the most time and efforts. As an actor, it takes time to develop a skill to play blind, there were lot many retakes,” says Hrithik. ‘Kaabil’ will release on January 25 and Hrithik is hoping to spread some cheer with this film.