Actor Shahid Kapoor, who plays a dark character in his forthcoming film "Haider", says although he prepared for the role the nagging thought that he's not "good enough" for it kept haunting him throughout the shoot.

An adaptation of William Shakespeare's tragedy "Hamlet", the film, directed by Vishal Bhardwaj, is set against the unrest in the Kashmir valley and revolves around a guy called Haider who wants to avenge his father's death.