Adrian Gonzalez, professionally known as K21, is an MC and producer from Adelaide, South Australia. He is signed to Golden Era Records, an Australian hip hop label based in Adelaide.

Known well amongst the community for connecting with local artists and gaining crucial experience in the studio, K21 puts together lyrics and beats of a global standard and currently works with some of the strongest names in the Australian hip hop world.

K21’s first official appearance was on Mr Trials' remix of the Funkoars track “This Is How”. He proved that he could produce by officially remixing “Where I Am” for the Funkoars' next album “The Quickening” in 2011 and “Good For Nothing” by the Hilltop Hoods the following year.

In May 2012, K21 released his debut album “Single Minded Civilian”. The following year, he released his “Kid Sinatra” EP and was signed to Golden Era.
He cemented his name in the Golden Era squad, performing the final verse in the “2013 Golden Era Cypher” and making numerous appearances on the mixtape.