Law enforcement sources tell TMZ that the platinum-selling rapper was found at around noon at his San Fernando Valley home and was pronounced dead at the scene.
Born in Pittsburgh as Malcolm McCormick, the rapper first found fame releasing music online as a teenager, choosing a minimalist style with heavy beats that harked back to early hip-hop.
When police later arrived at his home, Miller admitted to driving drunk and fleeing the scene.
Last month, Miller released his fifth studio album "Swimming" and was scheduled to begin his US tour in October.
Thursday night Mac posted a video of a record player and the song playing was from one of his albums.
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Miller had struggled with addiction problems for most of his life, especially following his breakup with singer Ariana Grande. I want to be able to have good days and bad days ...
"I have people that care about me and fans that love my music and it's a attractive relationship with them - people who have been with me through being a 19-year-old wide-eyed kid to being a self-destructive depressed drug user to making love music to all these different stages".
This death was an unfortunate tragedy caused by mental illness and a rising drug crisis going on in America right now.
Grande, who quickly became engaged to comedian Pete Davidson after splitting with Miller, did not immediately comment on the rapper's death but blocked comments on her Instagram page after a slew of critical remarks.
"I get super fucked up, still, all the time", he said in the short film.
Ellis - who later issued a feeble apology, saying "it would never be my intention" and "maybe I was too friendly" - had wrapped his arm around her, his hand high above her waist and his fingers pressed against her chest. We wish to extend our deepest condolences to his family and friends. People tagged the singer and claimed she was at fault for Miller's death because she broke off their relationship.
Miller had been in a long-term relationship with Ariana Grande, 25, which ended this past May.