Kim Su-Hyun (Korean: 김수현) — born January 15, 2000, is a Korean singer under Mystic Story, Member of the South Korean group Billlie (Korean: 빌리, the group debuted on November 10, 2021.

Suhyeon appeared on the survival show Produce 101 Season 1. She was eliminated in Episode 5 after ranking 69th place. It was later revealed that she was one of the 2 contestants in Season 1 who had been victimized by vote manipulation.

In October 2017, she became a contestant on the survival show MIXNINE. She made it until the final episode, but was eliminated when the boys' team won against the girls' team, and hence ultimately did not get to debut.

On November 10, 2021, she debuted in the group Billlie as Main Vocalist and Lead Dancer. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.