
Position: Leader/ Vocalist
Birthday: Febuary 12th, 1989 (21 years old)
Blood Type: A
Height/Weight: 178CM/60 KG
Star Sign: Aquarius
Specialties: knows how to speak Korean and Japanese, comedy, and dance
Educational Background : MyeongJi University – Musical Science
Experience: Happy Sunday (해피 선데이)(2006-2010) and Kokkiri (코끼리)(2008) Donghyun, being the eldest in the trainee bunch has been a trainee at Starship Entertainment for around 6 years now.

Position: Main Vocalist
Birthday: June 9, 1993
Blood Type: B
Height/Weight: 178 CM/58KG
Star Sign: Gemini
Educational Background : Young Dong High School

Position: Vocalist
Birthday: January 2, 1994
Blood Type: B
Height/Weight: 173CM/60KG
Education: Seoul Music High School
Personality: likes to chew bubble gum, plays the piano well, went to a music school in Seoul, quiet but funny, very serious but also mysterious. Also known as mirror prince, because he looks at the mirror for at least 4-7 hours a day.

Position: Vocalist
Birthday: April 24, 1995
It’s officially stated that Youngmin is the older twins by 6 mins.
Blood Type: A
Height: 180CM
Star Sign: Taurus
Educational Background : School of Performing Arts Seoul
Experience: Truth game(진실게임), All my love(몽땅내사랑)(2011) He starred as a student on ALL MY LOVE with his brother and Minwoo. As well as showing his strong dance moves with K.WILL as a backup dancer with Minwoo.He appeared in SISTAR’s PUSH PUSH music video along with Donghyun and his twins, Kwangmin.

Position: Dancer/Rapper
Birthday: April 24, 1995 (younger twins)
Blood Type: A
Height: a bit over 180CM
Star Sign: Taurus
Educational Background : School of Performing Arts Seoul
Experience: Truth game(진실게임), All my love (몽땅내사랑)(2011)
Youngmin and Kwangmin had experience a lot of acting and performing since they were young, it been said that they had been in over 300 CFs.

Position: Rapper/Dancer/ Maknae
Birthday: July 31, 1995
Blood Type: A
Height: 174CM
Star sign: Leo
Educational Background: School of Performing Arts Seoul
Specialities: Acting, Hapikdo & Swimming
Experience – KBS1′s “My Sweetheart, My Darling” (2005) *He was a minor character – SBS’s “Ghost Pang Pang” (2007) *Appeared as Kim Chul Doo (김철두) – KBS2′s “Wife and Woman” [AKA Windy City] (2008) *Appeared as Kwon Seung Il (권승일) – SBS’s “Amnok River Flows / Yalu River Flows” (2008) *Appeared as the adolescent stage of Mirok Li – Eleventh Mom (2007) (Movie) – Mother (2007) (Movie)
Information:
Language: Korean
Release Date : April 19, 2011
Language: Korean
Release Date : April 19, 2011
Tracklist :
1 Let`s Get It Started
2 Boyfriend
3 You & I
4 Boyfriend (Inst.)
5 You & I (Inst.)
2 Boyfriend
3 You & I
4 Boyfriend (Inst.)
5 You & I (Inst.)