Selfies just got serious.

has announced that he will be casting his Marc by Marc Jacobs AW14 campaign via Twitter and Instagram.

As expected, social media has gone wild, with the #CastMeMarc hashtag trending instantly and models (and non-models) by their thousands posting pics. Forget trawling the streets, the world wide web just opened up a whole new world in the fashion industry. What's next? Tickets to the front row given out via Facebook? Fashion shoots shot via Instagram?

Model pout at the ready - have you got the Marc factor?

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