Fromis 9 (Korean: 프로미스나인 or 프로미스 9; stylized as fromis_9) is a South Korean girl group formed by CJ E&M through the 2017 reality show Idol School. The group is composed of nine members: Roh Ji-sun, Song Ha-young, Lee Sae-rom, Lee Chae-young, Lee Na-gyung, Park Ji-won, Lee Seo-yeon, Baek Ji-heon and Jang Gyu-ri.
The group debuted on January 24, 2018, under Stone Music Entertainment with the release of their first extended play (EP), To. Heart. In September 2018, it was confirmed that Fromis 9 would be managed by Off the Record Entertainment, a new label established by Stone Music. As part of their transfer, Pledis Entertainment was in charge of creative direction and the production of the group’s music.
The group was co-managed by Off the Record and Stone Music. As of August 16, 2021, as part of the label reorganization of Off the Record Entertainment, Pledis Entertainment will serve as the management company for the group.