Shah Rukh Khan says has never felt complete as an actor and that's what has kept him going for almost three decades in the industry. The 53-year-old actor says rather than looking for end result, he believes in quietly celebrating milestones.

"I have never felt complete. As an artiste, I am very incomplete and I know that. If I am not, then I would not like to work. If I am complete then why would I wake up in the morning and work hard and still try to do something?," Shah Rukh said in a group interview. Shah Rukh says he is restless by nature.