Los Angeles, Aug. 20 -- Post Malone is engaged to Christy Lee, with the singer reportedly proposing to her with a diamond ring.

According to PEOPLE magazine, the news was shared on Wednesday through an Instagram Story posted by Lee's friend Marina Hollyer. Hollyer shared pictures of the couple, including one in which Lee showed off her engagement ring while wearing a veil and a "Bride to Be" sash.

In one of the pictures, Lee can be seen holding her left hand near her face as she shows off the ring. Hollyer also shared a picture of the couple posing with their friends and wrote, "My best friend in the world just got engaged, Love you more than words Toph!!!"

A representative for Malone did not immediately respond to PEOPLE's request for...