- Hye Mi (Main Vocal)
- Kyung Ree (Main Vocal, Visual)
- So Jin (Vocal, Rapper, Main Dancer)
- Keum Jo (Main Vocal, Maknae)
- Sung A (Vocal, Main Rapper, Lead Dancer)
- Jae Kyung (Leader, Vocal)
- Rana (Leader, Vocal, Rapper)
- Bini (Vocal)
- Eun Ji (Vocal, Lead Rapper, Main Dancer)
- Lee Sem (Vocal, Main Rapper)
- Sera (Leader, Main Vocal)
- Euaerin (Vocal, Main Rapper, Lead Dancer)
- Min Ha (Vocal, Visual)
- Hyun A (Leader, Lead Vocal)
On October 13, 2010, it was confirmed that Hyun A would join the group for rotational purposes while member Jae Kyung was modeling. However, on December 22, 2010 Jae Kyung officially left the group to focus on her modeling career.
On June 9, 2011, Star Empire announced that for promotions for "Figaro", members Rana and Bini would not participate but were still a part of the group, and that Nine Muses would promote Figaro as a seven member sub-unit. But, on August 11, Rana and Bini left the group to work on individual activities. Member Kyung Ree joined the group in January 2012 for their digital single "NEWS".
The group was set to come back in August with new members, however, this never materialized. The group was finally confirmed to be coming back on January 23, 2015 with their third mini album, DRAMA, with two new members.
In June 2015, the group confirmed the release of their special Summer album S/S Edition, set to be release July 02, 2015 with the current 8 member line-up.
In June 2016, due to the contract with Star Empire expiring, original members Euaerin and Min Ha decided to leave the company and the group. In October 2016, Hyun A also left the group after her contract expired.
A comeback was announced on May 31, 2017. It was also announced that Sung A would not be participating in the comeback due to wanting to focus on DJing and studying music. With Sung A's absence, Nine Muses and Nine Muses A now consist of the same members.
- Official Fanclub: MINE
- Official Colors: Purple & Silver
- [2013.10.14] PRIMA DONNA
- [2012.03.08] Sweet Rendezvous
- [2013.05.09] WILD
- [2015.01.23] DRAMA
- [2015.07.02] S/S Edition
- [2015.11.24] LOST
- [2017.06.19] Identity
- [2017.08.03] Love City (Repackage)
Collaboration Digital Singles
- [2010.04.07] Prosecutor Princess OST Part.2 (검사 프린세스) (Seo In Young, Nine Muses)
- [2011.11.30] Star Empire (Park Jung Ah, Seo In Young, ZE:A, Jewelry, Nine Muses)
- [2012.08.16] MBC Music 'MM Choice' Part.3 (MBC뮤직) (Nine Muses, Rhythm Power)
- [2012.09.05] That Woman Writes Lyrics, That Man Composes Music Season 2 OST (그 여자 작사 그 남자 작곡 시즌) (Tak Jae Hoon, Kim Jong Min, Nine Muses)
- [2010.10.21] Korean Beauty Design Expo - Beauty Popularity Star Award
- [2010.12.15] 18th Korean Culture Entertainment Awards: New Generation Popular Music Teen Singer Award
- Official Website
- Official Daum Fancafe
- Official YouTube Channel
- Official Facebook
- Official Twitter
- Official me2day
- Official YOZM
- Official Weibo