Yeonjun

Biography

Choi Yeon-jun (Korean: 최연준; born September 13, 1999), known mononymously as Yeonjun, is a South Korean singer and songwriter. He is a member of the South Korean boy band Tomorrow X Together, formed by Big Hit Entertainment in 2019. He debuted as a soloist in September 2024 with the song "Ggum" and released his first extended play No Labels: Part 01 on November 7, 2025 and Part 02, also an EP, on July 10, 2026.

Early life and education

Choi Yeon-jun was born on September 13, 1999, in Bundang District, Seongnam, South Korea, as an only child. He lived in the United States for two years to learn English before returning to South Korea. After graduating from Korean Arts High School, he enrolled in Global Cyber University.

Pre-debut

Prior to his debut, he trained under Big Hit Entertainment for four years. Throughout his four years of training, Yeonjun became known as the company's "legendary trainee" because he consistently ranked first during monthly evaluations in dance, vocal performance and rap. He is also a former trainee of Cube Entertainment. Yeonjun also appeared as a back up dancer at 2014 Melon Music Awards for a few performances.

2019–2024: Debut with Tomorrow X Together and solo activities

On January 10, 2019, BigHit announced the upcoming debut of its new boy group Tomorrow X Together. Yeonjun was the first member of the lineup to be revealed, through an introductory video posted on the label's official YouTube channel and social media. On March 4, 2019, he debuted as a member of Tomorrow X Together with the release of their first extended play (EP), The Dream Chapter: Star.
Yeonjun made his acting debut on January 12, 2021, with a cameo appearance in the JTBC drama series Live On as Kim Jin-woo. The following month, he participated in 2021 Fall/Winter New York Fashion Week, walking as a model for the South Korean brand UL:KIN. He featured on the track "Blockbuster" from Enhypen's first studio album Dimension: Dilemma, which was released on October 12.
In February 2022, Yeonjun featured on the single "PS5" by American singer-songwriter Salem Ilese, alongside bandmate Taehyun and Norwegian DJ Alan Walker. He was announced as a host for Inkigayo, alongside actors Roh Jeong-eui and Seo Bum-june, on March 15. In July, Yeonjun became an ambassador for the streetwear brand Privé Alliance. He also served as a guest creative designer and released a limited capsule collection available the following month until December.
In November 2023, he was announced as a co-host for the year-end festival SBS Gayo Daejeon alongside Key and An Yu-jin; the event was held on December 25. On June 25, 2024, it was announced that Yeonjun would be hosting the SBS Gayo Daejeon's Summer Edition alongside Ive's An Yu-jin and NCT's Doyoung.
In November 2024, it was announced that Yeonjun would be hosting the SBS Gayo Daejeon for the third consecutive time.

2024–present: Solo debut with "Ggum", No Labels: Part 01 and Part 02

Studio MaumC announced Yeonjun as part of the artist lineup for the OST of the Coupang Play original series Cinderella at 2 AM on August 16, 2024. He contributed the song "Boyfriend", which was released on September 1. On September 6, BigHit announced Yeonjun's upcoming debut as a solo artist. A video titled "Yeonjun's Mixtape Intro Film" was uploaded to the Hybe Labels official YouTube channel two days later, with his September 19 debut date revealed at the end. His debut was later revealed to be titled "Ggum", described as a "hip-hop track with a catchy electro sound". With the song, he won his first music show trophy, on Mnet's October 4 broadcast of M Countdown. In November 2024, Yeonjun was named one of GQ Korea's Men of the Year. Yeonjun released his first solo EP, No Labels: Part 01×NO LABELS: PART 017 November 2025 · EPSpotifyYouTube Music (search)Tracklist · 6 tracks1Talk to You2:302Forever3:063Let Me Tell You2:344Do It2:395Nothin’ ’Bout Me2:126Coma2:34, on November 7, 2025. He released his second EP, No Labels: Part 02×NO LABELS: PART 0210 July 2026 · EPSpotifyYouTube Music (search)Tracklist · 6 tracks1Vanilla2:342Ice Cream2:043조금 서툴러도 다시 (Baby Wassup?)2:544No More Disco2:405Fxxking Star3:046Long Way Long Ride2:50 on July 10, 2026.

Public image and endorsements

Yeonjun has been nicknamed "K-pop's 4th Generation It boy" by multiple sources, and has appeared on the Korean Business Research Institute's male celebrity brand reputation list, a chart that records Korean celebrities with the most online searches and engagements. He ranked within the top 20 in November 2020, and the top 30 in both February and March 2023.
Yeonjun has appeared in various fashion magazines including Dazed Korea, GQ Korea, W Korea, Elle Korea and Paper Magazine. He featured on the cover of the September 2022 special edition of the Japanese fashion magazine SPUR. On May 31, 2024, Yeonjun was announced as the global brand ambassador of the Italian luxury fashion house Moncler.
On March 10, 2026, Yeonjun walked the runway for Miu Miu at Paris Fashion Week. In April 2026, Yeonjun was officially announced as a Friend of the House for Miu Miu.

Philanthropy

In May 2024, Yeonjun donated 50 million won to Hallym Burn Foundation, an organization dedicated to assisting firefighters in their crucial line of duty.
On his birthday, September 13, 2026, Yeonjun donated 100 million won to the Community Chest of Korea, an organization that provides free meal programs for the low-income elderly residents of Seongnam, and to renovation work on aging welfare facilities there. This puts him in the Honor Society, a group of people who have donated at least 100 million won within 5 years.

Songwriting credits

All song credits are adapted from the Korea Music Copyright Association's database unless stated otherwise.