Boyfriend (Korean: 보이프렌드) is a six-member South Korean boy group under Starship Entertainment formed in 2011. They were the second K-pop group to after i-13 to have twins and the first boy band to do so. The group consists of Kim Donghyun, Shim Hyunseong, Lee Jeongmin, Jo Youngmin, Jo Kwangmin and No Minwoo. They debuted on Mnet's M!Countdown on May 26, 2011 with their debut single "Boyfriend". Their fanbase was officially named "Best Friend" as of August 10, 2011.
In 2011, they released three Korean singles Boyfriend, Don't Touch My Girl, I'll Be There respectively.
In 2012, a mini album Love Style and a full length album Janus, together with 2 Japanese singles Be My Shine and Dance Dance Dance / MY LADY.
In 2013, a Repackaged of Janus entitled as I Yah that was release on January 10 and a 3rd Japanese Single entitled Melody of Eyes on March 27.

Members:
Kim Donghyun( February 12, 1989) - Leader, Vocalist
Shim Hyunseong (June 9, 1993) - Main Vocalist
Lee Jeongmin (January 2, 1994) - Vocalist
Jo Youngmin (April 24, 1995) - Vocalist, Lead Dancer, Visual
Jo Kwangmin (April 24, 1995) - Main Rapper, Lead Dancer, Visual
No Minwoo (July 31, 1995) - Main Dancer, Lead Rapper, Maknae

Korean discography
Studio albums
2012: Janus
2013: I Yah (Repackaged)

Extended plays
2012: Love Style
2013: TBA

Digital singles
2011: Boyfriend
2011: Don't Touch My Girl
2011: I'll Be There

Collaboration singles
2011: Pink Romance
2012: White Love

Japanese discography
Singles
2012: Be My Shine
2012: Dance Dance Dance / MY LADY
2013: Melody of Eyes

Compilation Albums
Albums
2012: We Are BOYFRIEND