The 26-year-old singer wiped her Instagram account Monday to post a promo for her song with the 43-year-old British DJ and producer.
The teaser opens with string music and a clip of a disco ball in the shape of a broken heart. It ends with a photo of the same disco ball as a pendant on a necklace.
"11/29," Cyrus captioned the post, adding a broken heart emoji. "@iammarkronson."
"the heartbreak era is coming.... sooner than u think #featuring?" Ronson wrote.
"The girl in this snap helped me write one of my favorite songs. Coming soon," the producer said.
Cyrus last released the album Younger Now in September 2017.