• I. Introduction

    1THE9 (원더나인) was a nine-member project boy group signed under MBK Entertainment and managed by PocketDol Studio. They were formed through the competition reality show Under Nineteen and officially debuted on April 13, 2019 with the mini album XIX.

    The group was under a 18-month contract (originally 17-month) and officially disbanded on August 8, 2020.

    II. Career

    Under Nineteen, which began airing on November 3, 2018, concluded on February 9, 2019 where the final 9 members were chosen during the live finale broadcast. It was also revealed the group would be called 1THE9.

    On February 26, 2019, the debut date was set to April 12, 2019 (later changed to the 13th). On the same day, the concept photos of the members was revealed.

    On April 5, the debut timeline started and the name of the album was revealed to be XIX with the title track being "Spotlight". A pre-debut title track, "Domino", which was written and produced by Under Nineteen's vocal trainer Crush, was released on April 7. The group then made their official debut on April 13 with the release of the mini album.

    On April 17, they held their debut showcase through V Live, with their fandom and fandom color announced to be Wonderland and Lime Punch, respectively.

    On October 17, 2019, 1THE9 released their second mini album Blah Blah.

    On July 6, 2020, the group announced they would be coming back with their third mini album, Turn Over, on July 16.

    On July 27, it was confirmed that the group would be disbanding on August 8. They were originally scheduled to disband on July 8 but due to their comeback being postponed due to the COVID-19 pandemic, it was extended by a month.

    On August 3, 1THE9 announced that they would be releasing their final mini album, Good Bye 1THE9, on the 5th. The album is a special gift to their fans prior to the group's disbandment.

    III. Members

    Member Profile
    Stage Name: Yongha (용하)

    Birth Name: Yoo Yong Ha (유용하)

    Probable Position: Leader, Lead Rapper, Vocalist

    Birthday: January 11, 1999

    Zodiac Sign: Capricorn

    177 cm (5’10”)

    Weight: 64 kg (141 lbs)

    Blood Type: A

    Instagram: @you_haaaaa
    Stage Name: Taewoo (태우)

    Birth Name: Kim Tae Woo (김태우)

    Probable Position: Vocalist, Rapper

    Birthday: April 23, 1999

    Zodiac Sign: Taurus

    Height: 174 cm (5’8.5″)

    Weight: 62 kg (137 lbs)

    Blood Type: O

    Instagram: @shrimptang__
    Stage Name: Seunghwan (승환)

    Birth Name: Lee Seung Hwan (이승환)

    Probable Position: Lead Dancer, Lead Vocalist

    Birthday: May 20, 2000

    Zodiac Sign: Taurus

    Height: 178 cm (5’10”)

    Weight: 66 kg (145 lbs)

    Blood Type: B
    Stage Name: Yechan (예찬)

    Birth Name: Shin Ye Chan (신예찬)

    Probable Position: Main Vocalist, Lead Dancer

    Birthday: May 14, 2001

    Zodiac Sign: Taurus

    Height: 183 cm (6’0″)

    Weight: 64 kg (141 lbs)

    Blood Type: A
    Stage Name: Junseo (준서)

    Birth Name: Kim Jun Seo (김준서)

    Probable Position: Lead Vocalist, Lead Dancer, Rapper, Visual

    Birthday: November 20, 2001

    Zodiac Sign: Scorpio

    Height: 178 cm (5’10”)

    Weight: 64 kg (141 lbs)

    Blood Type: O

    Instagram: @__k_junseo
    Stage Name: Doyum (도염)

    Birth Name: Jeon Do Yum (전도염)

    Probable Position: Main Dancer, Lead Rapper, Vocalist, Center

    Birthday: February 21, 2002

    Zodiac Sign: Pisces

    Height: 174.5 cm (5’8″)

    Weight: 55 kg (121 lbs)

    Blood Type: B
    Stage Name: Jinsung (진성)

    Birth Name: Jung Jin Sung (정진성)

    Probable Position: Main Vocalist, Lead Dancer, Visual

    Birthday: March 30, 2002

    Zodiac Sign: Aries

    Height: 176.5 cm (5’9″)

    Weight: 59 kg (129 lbs)

    Blood Type: B
    Stage Name: Taekhyeon (택현)

    Birth Name: Jung Taek Hyeon (정택현)

    Probable Position: Main Rapper, Vocalist, Face of the group

    Birthday: July 28, 2003

    Zodiac Sign: Leo

    Height: 178 cm (5’10”)

    Weight: 66 kg (145 lbs)

    Blood Type: B

    Instagram: @th728
    Stage Name: Sungwon (성원)

    Birth Name: Park Sung Won (박성원)

    Probable Position: Main Rapper, Vocalist, Maknae

    Birthday: December 18, 2003

    Zodiac Sign: Sagittarius

    Height: 180 cm (5’11”)

    Weight: 58 kg (127 lbs)

    Blood Type: B

    Instagram: @inmypurple__

    IV. Discography

    Mini Albums

    Album Title Date of Release
    XIX 2019
    Blah Blah 2020
    Turn Over 2020
    Good Bye 1TH9 2020

    Digital Singles

    Single Title Date of Release
    Domino 2019

    V. Filmography


    Year Network Program
    2018-19 MBC Under Nineteen
    2019 MBC Wonderland


    Year Network Program
    2019 MBC Idol Radio
    2019 MBC FM4U Kim Shin Young's Noon Song of Hope