Kim Se-jeong, known mononymously as Sejeong, is a South Korean singer, actress and songwriter signed under Jellyfish Entertainment. She was the runner-up contestant in Mnet's survival show Produce 101, and debuted as member of the girl group I.O.I. She's also a former member of Gugudan and its subgroup Gugudan SeMiNa. Following the group's disbandment, she's currently active as a solo artist and actress.