There is a good news for Aamir Khan's fans. The advance booking for the much awaited film of 2014, 'PK' has started, tweeted the actor. And as the release is getting closer, Khan is losing his sleep.

Ever since the first look of the film was out, the actor has being actively participating in all the promotional events of the film.

The actor took to twitter to express his nervousness and wrote, "5 days to go and the advance booking opens tomorrow morning. Won't be able to sleep tonight. Wish me luck guys. #PKAana."