Jung Il-hoon

On February 21, 2019, Jung dropped a digital single, "Spoiler", featuring solo artist Babylon.

On February 12, 2018, it was announced that Jung would be releasing his first solo album the following March. The album, titled Big Wave, contained five tracks which feature, BTOB member, Hyunsik and Jinho of Pentagon. The lead single, "She's Gone", is a hip hop song which describes complicated feelings, Jung had previously performed the song at BTOB's 2017 BTOB Time - Our Concert, from 23–24 December at the Ilsan Kintex Exhibition Center. Jung participated in writing and composing the songs.

On May 24, 2017, it was revealed that Jung would be releasing a self-composed track on May 30, as part of BtoB's "Piece of BtoB" solo project. On May 26, it was revealed the song would be "Fancy Shoes", a song that he had 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.

In 2015, Cube Entertainment announced Hyuna's lead single for A+ would feature Jung. The track was titled "Roll Deep" (Because I'm the Best). 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. He was replaced by Cube Entertainment's trainee, Kim Hyo-jong. Later in 2015, Jung joined the line-up for Unpretty Rapstar 2's semi-finals episode as he performed with contestant Jiyoon for the track "This Ain't Me".

In 2015 Jung starred in the web-drama, Webtoon Hero: Tundra Show as Kim Sung-min.

In 2013, he was featured in 2YOON's Harvest Moon EP for the track "Nightmare", where he showed his impressive rapping skills. His featuring activities continued as he was later on revealed to be collaborating with G.NA for the lead single, "Oops!", of the Beautiful Kisses EP.

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.

Since 2012, Jung has been continuously appearing on variety show Weekly Idol as a special MC/ together with Apink's Bomi. Jung had his last broadcast on Weekly Idol on its 206th episode. In 2012, 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 2011, Jung (along with four other members of BtoB's initial line-up) made his acting debut in the JTBC sitcom, I Live in Cheongdam Dong.

Jung had filled in for label mate Yong Jun-hyung during some of G.NA's debut promotions with "I'll Back Off So You Can Live Better" on music shows, in 2010.

Jung Il-hoon (Korean: 정일훈 ; born October 4, 1994), simply known as Ilhoon, is a South Korean rapper, songwriter, record producer, and actor. He is the main rapper of the South Korean boy band BtoB. He is well known for his collaborations with artists such as Hyuna and G.NA, as well for being an assistant MC on the variety show Weekly Idol. Ilhoon made his acting debut as he starred in the drama Webtoon Hero: Tundra Show in 2015. He was also known for creating the gestures for "Gwiyomi Player".

Jung Il-hoon was born on October 4, 1994 in Seoul, South Korea. He graduated from Hanlim Multi Art School and attended Korea College of Media Arts with acting course. He is the younger brother of singer Joo.