The two were friends and collaborators for years - first working together on Grande's hit "The Way" - before officially becoming a couple in 2016.
After breaking her silence on his death over the weekend, the "Sweetener" singer followed up the post with a short video of herself and Miller. He is all smiles. "I really can't wrap my head around it". You were my dearest friend.
Following Grande and Miller's break up, Grande revealed on Twitter that she had supported the rapper after some fans blamed her for his DUI arrest in May.
"I adored you from the day i met you when i was nineteen and i always will", she wrote.
"I saw that, I was around it, I took phone calls from her, 'How do I help?" However, multiple people, including Ariana Grande's brother and Mac's close friend, came to her defense and praised her for always being there for him. The kindest and sweetest soul with demons he never deserved. i hope you are okay now. rest'.
If you or anyone you know are struggling with addiction, please reach out to the National Council on Alcoholism and Drug Dependence (NCADD) or Substance Abuse and Mental Health Services Administration (SAMHSA) for assistance, even if you just need to talk. I really wanted to.
Ariana is now engaged to "Saturday Night Live" star Pete Davidson. We worked through good times, bad times, stress and everything else.