Frankie Grande, Ariana Grande's older brother, has shared a remembrance on Instagram of rapper and producer Mac Miller, who passed away earlier this month from a suspected drug overdose.

Miller and Grande were together for two years, and during that time he and her brother became close as well. Miller even played an instrumental role in helping Grande get over his own drug and alcohol addiction issues.

Grande called himself "heartbroken" over Miller's passing, and described him as "a good friend" who "was wonderful to my sister."

"He was the reason I went to the rehabilitation center where I was detoxed safely from all of the drugs alcohol and medications I was taking, when I couldn’t imagine living without them.

It was the place where I found the community of support that showed me that living life without drugs was a possibility and I would never have discovered that if it weren’t for Malcolm," he wrote.

Miller was also there for Grande after he left rehab, giving him gifts and words of encouragement when he would hit a new milestone. Grande now has over 450 days of sobriety. He encouraged others to also get help, writing, "This is a difficult road but YOU DO NOT HAVE TO TRUDGE IT ALONE."

"Malcolm my friend, you will be dearly missed and I know you will be looking down on me from heaven, proud AF for every day I live my life clean and sober," Grande said.

Ariana also posted a picture of Miller to Instagram recently, although her's was without caption.