DOO JOON

Yoon Doo-joon (Hangul: 윤두준), the leader of the group. He was born in Seoul, South Korea on July 4, 1989.^[82] Prior to his debut with Beast, he was a trainee at JYP Entertainment and was featured in the Mnet documentary Hot Blooded Men with 2AM and 2PM, but was eliminated along the course of the show.^[83] He then moved to Cube Entertainment and was featured as a rapper in AJ’s “Wipe the Tears”.^[84] After his debut with the group, he became part of Danbi^[85] and debuted as an actor through More Charming by the Day and All My Love.^[86]

 ^{HYUN SEUNG}

Jang Hyun-seung (Hangul: 장현승) was born on September 3, 1989.^[82] He is a lead vocalist and the lead dancer. He first received media attention as a trainee under YG Entertainment with the nickname So-1 when he was preparing to debut as a member of Big Bang. He appeared in 10 out of 11 episodes of the Big Bang Documentary, but wasn't chosen to be a part of the final group formation by YG's president because his maturity hadn't fully developed yet and was not ready to be a singer.

JUN HYUNG

Yong Jun-hyung (Hangul: 용준형),^[82] the main rapper of the group, was originally named as Yong Jae Soon (Hangul: 용재순) but had changed his name during his 6th grade.^[87] He was born in Seoul, South Korea on December 19, 1989.^[82] He was once a member of the boyband “Xing” along with Kevin from U-KISS and was known as Poppin’ Dragon when he was promoting with them. He featured in various singles as a rapper from different artists such as labelmates Hyunah’s “Change”^[88] and G.NA’s “Kkeojyeo Julge Jar Sara” (꺼져 줄게 잘 살아, lit. I’ll Back Off So You Can Live Better),^[89] Young Jee’s "Crazy, that's what love is",^[90] Navi’s "Go Again" and Wheesung’s “Words That Freeze My Heart”.^[91]

 ^{YO SEOB}

Yang Yo-seob (Hangul: 양요섭) was born in Seoul, South Korea on January 5, 1990.^[92] He’s the main vocalist of the group and was once a back-up dancer for AJ’s music videos for “Dancing Shoes" and "Wiping the Tears".^[93] He released a digital single together with Dalmatian’s Daniel titled “First Snow and First Kiss” ^[94] and participated in singing OST’s for various Korean dramas such as “Happy Birthday” for More Charming by the Day^[95] and “I Cherish That Person” for My Princess.^[96] and "Loving You" - for All My Love.He also became a permanent cast member on KBS's Oh! My School (a.k.a. 100 Points out of 100), along with other idols such as MBLAQ's Lee Joon, Secret's Hyosung, T-ara's Soyeon, Miss A's Min, and Simon D.[6].In March 20th to April 10th 2011,BEAST's Yoseob has casted in 'Gwanghwamun Sonata The Musical' as Jiyong,the son of the two leading role. BEAST's Yoseob was featured in Bang Yong Gook's first solo track, "I remember" which was jointly composed by One Way’s Chance and Bang Yong Gook himself. On September 27th, KBS‘s ‘Poseidon‘ released part one of their OST series, which featured the vocal talents of B2ST‘s Yang Yoseob. Yoseob’s new song, “No“, was a collaboration piece between Rado (of Huh Gak‘s “Hello“) and production duo Ji In and Wontag, the men behind MBLAQ’s latest releases. The song features sorrowful lyrics of a man who has no choice but to let go of his lover..^[97].

AJ

Lee Gi-kwang (Hangul: 이기광) was born on March 30, 1990.^[92] He is a lead vocalist and the main dancer. He was known as the solo singer AJ or Ace Junior when he first debuted and released a mini-album "First Episode: A New Hero” on April 4, 2009.^[98] He met controversies when his name created dispute among netizens for having a similar name with Paran’s AJ (Later became the new U-KISS member). He now goes with his original name when he redebuted with Beast.^[99] He debuted as an actor through High Kick Through the Roof^[100] and was also casted in a role for My Princess.^[101] He also became an MC for different shows such as Hot Brothers,^[102] Win Win^[103] and SBS Inkigayo.

DONGWOON

Son Dong-woon (Hangul: 손동운), was born in was born in Seoul, South Korea on June 6, 1991.^[92] He is the group's Maknae (youngest member) and a vocalist of the group. Dong Woon was a trainee from JYP Entertainment for 2 years, and was the last member chosen to join Beast. In December 2010, Dong Woon released a digital single "Udon" together with Davichi’s Kang Min Kyung, however, it wasn’t broadcasted in any of South Korea’s 3 main broadcasting stations because the title of the song was in Japanese.^[104]