2010–2011: Pre-debut As a trainee Jung had filled in for labelmate
Yong Jun-hyung during some of
G.NA's promotions for "I'll Back Off So You Can Live Better" on music shows, in 2010. In 2011, Jung, along with four other members of BtoB's initial lineup, made his acting debut in the JTBC sitcom,
I Live in Cheongdam Dong.
2012–2016: Debut in BtoB and early career Jung debuted as the main rapper of the boy group
BtoB in 2012. The group made their official debut on Mnet's
M! Countdown on March 21. From 2012 to 2016, Jung was featured as a regular guest together with
Apink's
Bomi on the music variety show
Weekly Idol. He collaborated with
4Minute's
Gayoon with the song "My Love By My Side" for the musical of the same name. He also featured in
Hyuna's "Unripe Apple" which was a track from her second EP,
Melting. In 2013, he was featured in
2YOON's
Harvest Moon EP for the track "Nightmare". He later collaborated with G.NA for her lead single, "Oops!", off the
Beautiful Kisses EP. In 2015, Jung starred in the web-drama,
Webtoon Hero: Tundra Show as Kim Sung-min. He also participated in the making of the album. He was only able to perform with Hyuna twice as there was a conflict with other BtoB schedules, and was covered by Cube Entertainment's trainee,
Kim Hyo-jong. Later in 2015, Jung featured in ''
Unpretty Rapstar 2's'' semi-finals episode as he performed with contestant
Jiyoon for the track "This Ain't Me".
2017–2020: Solo career beginnings and hiatus On May 24, 2017, it was announced that Jung would be releasing a self-composed track on May 30, as part of BtoB's "Piece of BtoB" solo project. He released "Fancy Shoes", a song that he had previously performed at BtoB's solo concert,
BtoB Time 2017. In September 2017, it was announced Jung would be joining the cast of web-mockumentary (fashioned as a cosmetics reality program),
The Cushion, alongside label mate
Yoo Seon-ho and Korean
beauty YouTuber Lena. All the episodes were uploaded on Naver TV, YouTube and Oksusu from October to November 2017. On February 12, 2018, it was announced that Jung would be releasing his first solo album in March. The album, titled
Big Wave, was released on March 8, containing five tracks which featured fellow BtoB member
Hyunsik with the song "Come Closer" and
Jinho of
Pentagon with the song "Always". The lead single, titled "She's Gone", is a hip-hop song which describes complicated break up feelings. Jung had previously performed the song at BTOB's
2017 BTOB Time - Our Concert, from 23 to 24 December at the Ilsan Kintex Exhibition Center. He participated in writing and composing all songs on the EP. In October, he was featured on the song "Cookies" from
F.T. Island's
Lee Hong-gi's EP
Do n Do. On February 21, 2019, Jung dropped a digital single, "Spoiler", featuring solo artist
Babylon. Jung departed from BtoB following a
drug scandal on December 31, 2020, after being investigated by the
Seoul Metropolitan Police Agency for using marijuana in prior years.
2024–present: Return to activities From October 4 to October 6, 2024, Jung held his first solo art exhibition "Tiny Ark" at KIR SEOUL. On November 21, Jung released the digital single, "lullaby", his first release in nearly six years. == Personal life ==