Untuk masa pre-debut, Kwang Min dan Young Min sebelumnya sempat menjalani audisi untuk JYP Entertainment, di mana mereka di training selama dua tahun. 100 hari ketika mereka menjadi aktor anak-anak, Kwang Min dan Young Min telah muncul di lebih dari 300 iklan. Sementara itu, sang leader Dong Hyun ketika masih di SMA turut membintangi CONDUCT ZERO, sebuah variety show di mana enam siswa pemberontak di SMA tiba-tiba harus menjadi siswa panutan. Ia juga berada di salah satu grup jepang demi satu iklan.
No Min Woo adalah member pertama dari grup ini yang diungkap ke publik. Diberitakan pada tanggal 22 Maret 2011, Min Woo menjadi cameo di music video My Heart Beating, K-Will yang juga bernaung di management yang sama dengan Boyfriend. Dua hari kemudian foto dari si kembar Jo Young Min dan Jo Kwang Min diungkap oleh Starship Entertainment. Diungkap juga bahwa sebelumnya mereka berdua adalah back-up dancer dari K-Will di program That Changes the World, tepatnya pada bulan Januari 2011.
Sebelum debut mereka, Boyfriend terlibat program M! PICK, yang mana memperlihatkan apa saja yang mereka pelajari. Sementara itu video teaser pertama Boyfriend, Let's Get It Started dirilis pada 20 Mei 2011. Sementara itu pada tanggal 27 Mei, Starship merilis music video dari single debut Boyfriend. Pada hari yang sama mereka melakukan debut di Music Bank.
PROFILE
1. Donghyun
Birth Name: Kim Dong Hyun (김동현)
Stage Name: DonghyunPosition: Leader, Lead Vocalist
Date of Birth: February 12, 1989
Height: 178 cm
Weight: 60 kg
Blood Type: A
Educational Background: MyeongJi University – Musical Science
Specialty: knows how to speak Korean, Japanese and English fluently
Fun Facts:
- The least eater in the group.
- He has the most interest in fashion.
- He shares room with Minwoo & Hyunseong.
- Before doing something, Donghyun will think it first.
- He is really forgetful.
- The funniest member in the group.
- He’s troublemaker and very curious person.
- He likes doing gags.
- His childhood dream is to be a pianist.
- He give a lots of advices and scolds because he want Boyfriend’s members to do their best.
Birth Name: Shim Hyun Seong (심현성)
Stage Name: Hyunseong
Position: Main Vocalist
Date of Birth: June 9, 1993
Height: 178 cm
Weight: 58 kg
Blood Type: B
Educational Background: Young Dong High School
Specialty: Knows Japanese
Fun Facts:
- He shares room with Minwoo & Donghyun.
- The most eater in the group.
- Hyunseong is a man who is almost perfect.
- He’s kind and shy, also has a good personality.
- He has huge insights.
- He loves reading books.
- His childhood dream is to be a drummer.
- He loves Hamburger and Donakatsu the most.
Birth Name: Lee Jeong Min (이정민)
Stage Name: JeongminNickname: Mirror Prince
Position: Lead Vocalist
Date of Birth: January 2, 1994
Height: 173 cm
Weight: 60 kg
Blood Type: B
Educational Background: Seoul Music High School
Specialty: Piano
Fun Facts:
- He likes to chew bubblegum.
- His role-model is G-Dragon.
- He shares room with Youngmin & Kwangmin.
- He is a look-a-like of Yoo Seung Ho.
- He can be quiet at times, but he’s also funny, very serious and also mysterious.
- He used to have a habit of biting his nails.
- He’s always keep optimist in any poor situation.
- He is the joker in the group.
- He wants to be a romantic type of boyfriend.
4. Youngmin
Birth Name: Jo Young Min (조영민)
Stage Name: Youngmin
Position: Vocalist, Lead Dancer, Face of The Group
Date of Birth: April 24, 1995 (Older Twin)
Height: 180 cm
Blood Type: A
Educational Background: School of Performing Arts Seoul
Specialty: Acting
Fun Facts:
- He’s very emotional and the most sensitive member.
- He shares room with Kwangmin & Jeongmin.
- He is older than Kwangmin by 6 minutes.
- He can’t talk properly when gets really nervous.
- He does things very slow, so everyone has to wait for him all the time.
- He once went missing during practice
time. They searched for him for almost an hour. Eventually, they found
him asleep on the toilet seat due to over crying.
- He washes his hand whenever he’s stressed.
- He wants to be the type of boyfriend that is serious when the situation is serious and be funny when joking.
5. Kwangmin
Birth Name: Jo Kwang Min (조광민)
Stage Name: Kwangmin
Position: Main Rapper, Lead Dancer
Date of Birth: April 24, 1995 (Younger Twin)
Height: 180 cm
Blood Type: A
Educational Background: School of Performing Arts Seoul
Specialty: Acting
Fun Facts:
- Fails at winking.
- He loves Pikachu.
- He shares room with Youngmin & Jeongmin.
- He’s very innocent and kind, he knows how to share things with others.
- He’s too hyper.
- When Kwangmin forgets dance moves, he asks Minwoo for help.
- Kwangmin has a 4-Dimensional personality or have 4D-Attitude.6. Minwoo
Birth Name: No Min Woo (노민우)
Stage Name: Minwoo
Position: Lead Rapper, Main Dancer & Maknae
Date of Birth: July 31, 1995
Height: 174 cm
Blood Type: A
Educational Background: School of Performing Arts Seoul
Specialties: Acting, Hapikdo, Swimming & Fluent in English
Fun Facts:
- Fanboy of SNSD’s Jessica.
- He has acting experience before.
- He likes Hyunseong more than the other members.
- He was known as the “King of Sweating” because he sweats the most.
- He can easily have bad mood.
- He shares with Donghyun and Hyunseong.
- He wanted to have a cool image, but ended up with a cute image.
- He likes Mickey Mouse.