* Birth name: Kim Yubin (Hangul: 김유빈; Hanja: 金瑜斌)
* Date of birth: October 4, 1988 (1988-10-04) (age 20)
* Position: Rapper
* Discovery: Good Entertainment Trainee
Sunmi
* Birth name: Sun Mi (Hangul: 선미; Hanja: 宣美)
* Date of birth: May 2, 1992 (1992-05-02) (age 16)
* Position: Sub Vocal
* Discovery: JYP Entertainment Trainee
Sunye
* Birth name: Min Sunye (Hangul: 민선예; Hanja: 閔先藝)
* Date of birth: August 12, 1989 (1989-08-12) (age 19)
* Position: Leader, Main Vocal
* Discovery: 2001 Park Jin Young's Challenge of 99%
Sohee
* Birth name: Ahn Sohee (Hangul: 안소희; Hanja: 安昭熙)
* Date of birth: June 27, 1992 (1992-06-27) (age 16)
* Position: Sub Vocal
* Discovery: JYP Entertainment Trainee
Ye-eun
* Birth name: Park Ye-eun (Hangul: 박예은; Hanja: 朴譽恩)
* Date of birth: May 26, 1989 (1989-05-26) (age 19)
* Position: Lead Vocal
* Discovery: 2006 audition during the show MTV 'Wonder Girls Season 1'
