As news broke of rapper Mac Miller's death on Friday afternoon (US time), fans and fellow artists alike took to social media to express their grief.

The rapper was found dead in his home of an apparent overdose, at just 26 years old.

The star has been open about his struggles with mental health, substance use and addiction, which many referenced in paying tribute to him, urging others to seek help.

Fellow artist Missio wrote: "Addiction is taking over people's lives and killing them. If you need help PLEASE share your struggles and ask for help".

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While another referenced some of Miller's lyrics in which he rapped about being desparate to find a way out of his own head.

Others, including fellow stars Chance the Rapper, Jaden Smith, Swae Lee and more simply shared their grief, condolences and memories of the young rapper.