Question: Onew, Jonghyun, Key and Minho had a fifth member of their South Korean boy group that was formed in 2008. This member also began his acting career in 2009 in an MBC comedy. Who is he?

Context articles: Lee Tae-min
Choi Min-ho (entertainer)
Leo (singer)
Onew
Ken (singer)
Kim Jong-hyun (singer)
Shinee
Hyuk (singer)
List of songs written by Kim Jong-hyun
N (singer)

Lee Tae-min (born July 18, 1993), better known by the mononym Taemin, is a South Korean singer and actor.
 He debuted as a vocalist of the group Shinee in May 2008 under S.M. Entertainment.
 He began his acting career in 2009 with MBC's comedy "Tae Hee, Hye Kyo, Ji Hyun" as Junsu.
Choi Min-ho (born (1991--) 09, 1991 ), better known by the mononym Minho, is a South Korean singer and actor.
 He debuted as a member of South Korean boy group Shinee in May 2008.
 Aside from group activities as singer, he has debuted as an actor in November 2010 in a KBS2's drama special, entitled "Pianist".
 He has since had roles in various television dramas such as SBS's sitcom, "Salamander Guru and The Shadows" (2012), "To the Beautiful You" (2012), "Medical Top Team" (2013), "Because It's The First Time" (2015) and "" (2016).
 He made his big screen debut in 2016 with the movie "Canola".
Jung Taek-woon (Hangul: 정택운 , born on November 10, 1990), better known by his stage name Leo (Hangul: 레오 ), is a South Korean singer, songwriter and musical theatre actor, signed under Jellyfish Entertainment.
 Known for his high-pitched, sharp, and clear vocals, Leo debuted as a member of the South Korean boy group VIXX in May 2012, and began his acting career in 2014 in the musical "Full House" as Lee Young-jae.
 In 2015 he began his songwriting career, and with VIXX member Ravi formed VIXX's first official sub-unit VIXX LR.
Lee Jin-ki (born (1989--) 14, 1989 ), better known by his stage name Onew, is a South Korean singer and actor.
 Born in Gwangmyeong, Gyeonggi-do, Onew was discovered at the 2006 S.M. Academy Casting and signed the contract with S.M Entertainment the day after his audition.
 He debuted as one of the lead vocalists of boy group Shinee in May 2008, who went on to become one of the best-selling artists in South Korea.
Lee Jae-hwan (Hangul: 이재환 born April 6, 1992), better known by his stage name Ken (Hangul: 켄 ), is a South Korean singer and actor, signed under Jellyfish Entertainment.
 He is one of the members in the South Korean boy group VIXX and has been widely praised for his unique, soulful, and husky vocal tone.
 Ken began his acting career in 2014 in MBC Every 1's comedy drama "Boarding House No. 24" as Lee Jaehwan.
Kim Jong-hyun (born April 8, 1990), better known by the mononym Jonghyun, is a South Korean singer-songwriter, and radio host.
 He is a vocalist of the South Korean boy group Shinee, and has further participated in S.M. Entertainment's project group S.M.
 The Ballad.
 Jonghyun debuted as a solo artist on January 12, 2015, with his first EP, titled "Base".
 In the same year, on September 17, Jonghyun released a compilation album, "Story Op.1".
 On May 24, 2016, Jonghyun released his first studio album, "She Is", followed by his second compilation album, "Story Op.2" on April 24, 2017.
Shinee ( ; Korean: 샤이니; Japanese: シャイニー; stylized as SHINee) is a South Korean boy group formed by S.M. Entertainment in 2008.
 The group is composed of five members: Onew, Jonghyun, Key, Minho and Taemin.
Han Sang-hyuk (Hangul: 한상혁 born July 5, 1995), most often credited as Hyuk (Hangul: 혁 ), is a South Korean singer and actor, signed under Jellyfish Entertainment.
 Hyuk debuted as a member of the South Korean boy group VIXX in May 2012, and began his acting career in 2016 in the comedy-action film "Chasing" as Han Won-tae.
Kim Jong-hyun (most often credited as Jonghyun), is a South Korean singer-songwriter and producer.
 He began his musical career in 2008 as a member of the group Shinee and later formed the ballad group S.M.
 The Ballad.
 Jonghyun debuted as a composer happened to write Korean lyrics for the Shinees promotional single "Juliette", which was featured in the mini-album "Romeo", released in May 2009.
 Participate in the writing of three songs on Shinee's second Korean studio album, "Lucifer", the first, "Up & Down", was co-written with Misfit with the rap being written by Minho, the second, "Obsession", was completely written by Jonghyun with Minho once again working on his own rap, and the third "Shout Out" co-written by all members of Shinee, JQ and Misfit.
 In 2012, Jonghyun co-wrote the lyrics to the song with "Alarm Clock" with Minho, a song about wishing to wake up from the nightmare of a past break up, and wrote the lyrics to "Honesty" which was described as a song written for the fans who had stayed by their side with unchanging love until that point.
 Both songs were featured on the mini album, "Sherlock".
Cha Hak-yeon (Hangul: 차학연 , born June 30, 1990), better known by his stage name N (Hangul: 엔 ), is a South Korean singer, actor, presenter, and radio host, signed under Jellyfish Entertainment.
 Debuted as a member of the South Korean boy group VIXX in May 2012, he began his acting career in 2014 in MBC's romantic-melodrama "Hotel King" as Noah.
 He has since had roles in "The Family is Coming" (2015), "Cheer Up!
" (2015) and "Tomorrow Boy" (2016).
 N began his career as a radio host in May 2015 with his show "VIXX N K-pop" on SBS Power FM.