Instagram Founder Quick, Take a Pic ... I'm a DJ Now!

9/30/2012 4:46 AM PDT BY TMZ STAFF
Kevin Systrom
-- who co-founded Instagram and then sold it to Facebook for $1 billion -- isn't just a tech-genius, he also moonlights as a DJ ... and we have pics to prove it.

Systrom was in Las Vegas last night, partying his face off with about 30 of his new FBook buddies -- when he started DJ'ing a set at Rain Nightclub in the Palms Hotel.

This isn't Systrom's first go at spinning records -- he reportedly moonlit as a DJ back in his Stanford days. 

FUN FACT: "Entourage" star Adrian Grenier was there too ... which answers the question, "What's that guy been up to?"