Nine Muses A (Korean: 나인뮤지스A, stylized in all caps or 9MUSES AMUSE) was the first sub-group of South Korean girl group Nine Muses formed by Star Empire Entertainment in 2016.

It is composed of four Nine Muses members: Gyeongree, Hyemi, Sojin and Keumjo.

The group released their debut single album Muses Diary on August 4, 2016.

After the departure of members Minha and Euaerin from Nine Muses in June 2016, Star Empire announced that the group would be making a summer comeback with a unit promotion with no further details.

[2] On July 21, it was revealed that the full line-up for the sub-group consisted of members Gyeongree (Center), Hyemi (Leader), Sojin (Rapper) and Keumjo (Main Vocal), also revealing that the song "Lip 2 Lip" would be their debut song.