How to Find an Internship at Google?

Probably the most commonly asked question by my students and graduates; how to find an internship at Google? I think Hollywood heard this desperate screams and released a movie called ‘The Internship’.
It is about two guys working in marketing department of a company. When the company stops it operations, these guys technically become jobless and decide to try their chance on Google :) I am definitely sure The Internship is a very funny movie and we can have a chance to see what is inside the Google head quarters.