According to the report, the rapper died of an apparent overdose at his home in California.
He was reportedly found by a friend, who then called 911.
Miller suffered from substance abuse issues and was arrested for a DUI recently after his highly publicized breakup with singer Ariana Grande. The two broke up earlier this year.
“All of us at Warner Bros. Records are deeply shocked and saddened by the tragic news of Mac Miller’s untimely passing. Mac was a hugely gifted and inspiring artist, with a pioneering spirit and a sense of humor that touched everyone he met," said Tom Corson, co-chairman and COO with Warner Bros. Records, who represented Miller. "Mac’s death is a devastating loss and cuts short a life and a talent of huge potential, where the possibilities felt limitless. We join all of his fans across the globe in extending our thoughts and prayers to his family and friends.”
After news of Millers' death broke, celebrities and artists shared condolences and reactions on Twitter.
Miller had just released his album, Swimming, in August, and was scheduled to perform in Phoenix on November 2.
I dont know what to say Mac Miller took me on my second tour ever. But beyond helping me launch my career he was one of the sweetest guys I ever knew. Great man. I loved him for real. Im completely broken. God bless him.
NOOO! I do not wanna believe my brother is dead! I cannot take this anymore, life is too short...I just know you’re now in a better place now than this place we call Earth @MacMiller ...I love you bro, and will miss youu 😭
So sad u gone home young Mac I had to post this to smile and think about the good Time we had on the set of this movie man god bless ya family. Pittsburg we lost a real one today 🌟 @macmiller 🙏🏾 pic.twitter.com/AZkqUlhm1V