Park Haneum

On June 10, 2017, Haneum was announced as the first generation member of the kids group YOUNGEST. On September 8, Haneum was featured in the trailer for the show My Teenage Girl, confirming her participation. She was eliminated in the fourth episode, during a second round mid-point check.

At the end of 2021, Haneum was introduced as a new member of Muse Odyssey's kids girl group, Little Muse.