Kim Ji-yeon, known professionally as Kei, is a South Korean singer and musical actress. She rose to fame as a member of South Korean girl group Lovelyz in November 2014. Kei officially made her solo debut with released EP on October 8, 2019 titled Over and Over. On November 16, 2021, she left Woollim Entertainment after deciding not to renew her contract, following Lovelyz's disbandment.