The young rapper died Friday around noon of an apparent overdose. He was found at his home in Fernando Valley where he was pronounced dead.
Mac Miller has been battling his issue with substance abuse for years – which is something that was known about a little bit after his breakup with Ariana Grande.
The rapper was arrested back in May for DUI and hit and run after wrecking his G-Wagon around a utility pole.
Miller just released his fifth album, Swimming, and was supposed to go on tour in October.