Stage name: Onew (온유 or 温流)

Birth name: Lee Jinki (이진기)

Birth date: December 14, 1989 (1989-12-14) (age 18)

Position: Leader, Sub vocal

Specialties: Can play piano.

Stage name: Minho (민호 or 珉豪)

Birth name: Choi Minho (최민호)

Birth date: December 9, 1991 (1991-12-09) (age 16)

Position: Rap, Vocal

Specialties: Can speak Chinese and English

Stage name: Jonghyun (종현 or 鐘鉉)

Birth name: Kim Jonghyun (김종현)

Birth date: April 8, 1990 (1990-04-08) (age 18)

Position: Lead vocal

Hobbies: Watching movie, Singing

Specialties: Can speak Chinese.

Stage name: Key (키)

Birth name: Kim Kibum (김기범)
Birth date: 23 September 1991(1991-09-23) (age 16)

Position: Rap, Vocal
Specialties: Can speak Chinese and English.