Joss Whedon has helmed two of the most successful flicks in the recent history of comic book movies: The Avengers and Avengers: Age of Ultron are cinematic feats unlikely to be soon outclassed.

As writer and director of the two Marvel hits, Joss Whedon has directly shaped up the stories and his print is all over the two installments.

Remember when he said Age of Ultron was "hardest juggling act I have ever, ever tried to pull off", calling the sequel a "nightmare"?

Now that it's out in the open and that it will likely register the largest success "“ box-office wise, and not only, I might add "“ ever, Joss Whedon spilled the beans and revealed some of the secrets of his triumph with Age of Ultron.

The characters: essential to Age of Ultron

Joss Whedon sat with Comic Book and revealed a lot about the creative process behind Age of Ultron.

I guess anyone who saw the installment noticed this is not a character piece. But, according to Joss Whedon, the characters meant a lot. In his words, it goes like this: