Miley Cyrus Thanks Ariana Grande for Including Her in One Love Manchester Concert in Sweet Post

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Katy Perry, Justin Bieber, Coldplay and others will also be performing at the benefit concert on Sunday.

Miley Cyrus is grateful for the opportunity to participate in Ariana Grande's One Love concert benefiting the victims of the Manchester bombing.

The 24-year-old singer took to Instagram on Wednesday to thank Grande in a sweet message about how much she cherishes their "great" friendship.

WATCH: Ariana Grande Returning to Manchester for Charity Concert Featuring Katy Perry, Miley Cyrus, Justin Bieber & More

"Thank you @arianagrande for having me at your very special One Love benefit concert in Manchester!" Cyrus wrote alongside a video from the pair's duet of 'Don't Dream It's Over" for Happy Hippie's Backyard sessions in 2015. "Always been a great friend to ME & @happyhippiefdn !!!!"

WATCH: Katy Perry Talks Manchester Tragedy, Shares Message of Love With Ariana Grande Fans

Justin Bieber, Katy Perry, Niall Horan, the Black Eyed Peas, Coldplay, Usher and Pharrell Williams are also set to perform at the One Love Manchester benefit concert at Emirates Old Trafford cricket ground on June 4, which sold out in minutes on Thursday. 

Proceeds from the event will go to the Red Cross’ Manchester Emergency Fund, aiding those affected by the bombing at Grande's Manchester Arena concert on May 22, in which 22 were killed and 59 were injured. 

See more in the video below.