VIDEO : Rapper Mac Miller's Death Ruled Accidental cocaine, Fentanyl Overdose

LOS ANGELES (Reuters) - Rapper Mac Miller, the former boyfriend of pop star Ariana Grande, died of an overdose of cocaine and the powerful opioid fentanyl, the Los Angeles coroner?s office said on Monday. Miller had spoken openly of his drug addiction in interviews and in his music, and dated Grande, 25, for about two years before the couple split earlier this year. The rapper?s death was thought to be one of the factors in the breakup last month of Grande and new boyfriend Pete Davidson, a ?Saturday Night Live? comedian, whose engagement in June after dating for less than two months became a celebrity media sensation.