Leehan

BOYNEXTDOOR’s Leehan: Profile, Biography, and Facts

BOYNEXTDOOR member Leehan (Kim Dong-hyun) is one of the six talented K-pop idols who make up the South Korean boy group under KOZ Entertainment, a label helmed by producer Zico and affiliated with HYBE Labels. Since debuting on May 30, 2023 with the single album Who!, Leehan has grown into a recognizable face of the group’s “boy next door” concept, contributing to the group’s vocals, rap, and behind-the-scenes songwriting.

Early Life and Trainee Days

Leehan is a member of the South Korean boy group BOYNEXTDOOR under KOZ Entertainment, admired for his warm mid-to-low vocal tone, clean dance lines, and gentle, considerate personality. Born Kim Dong-hyun on October 20, 2004, in Busan, South Korea, Leehan grew up near the beach and spent his early years practicing taekwondo before shifting his focus toward music and dance. He passed his KOZ Entertainment audition in 2022 and trained for about a year before officially debuting with BOYNEXTDOOR on May 30, 2023, through the single album Who!. Within the group, Leehan is often described as the emotional anchor, the member who plays counselor to the others and keeps the group’s atmosphere calm and supportive. He is also known as one of BOYNEXTDOOR’s visual members, recognized for his tall, slender frame and warm features. Leehan’s most distinctive personal interest is fishkeeping and aquascaping; he designs his own aquarium landscapes and is affectionately nicknamed “Fish Dad” by fans and members alike. In July 2024, he briefly paused group activities to recover from skin inflammation before returning to promotions. As BOYNEXTDOOR has released records such as 19.99, No Genre, The Action, and their debut studio album Home, Leehan continues to stand out for his stable vocals, jazz-influenced tone, and grounded, caring presence.

Career with BOYNEXTDOOR

As part of BOYNEXTDOOR, Leehan has promoted through the group’s full discography, from the “First Love” trilogy of Who!, Why.., and How? to later releases like 19.99, No Genre, The Action, and the group’s first studio album Home. Fans of the fandom ONEDOOR continue to follow Leehan’s growth as a performer through comebacks, world tours, and variety content.

Personality and Fun Facts

Beyond the stage, Leehan is known among ONEDOOR and fellow members for a distinct personality and set of hobbies detailed further in the trivia section below. From personal habits to behind-the-scenes stories, these details help fans get closer to who Leehan really is outside of BOYNEXTDOOR’s music and performances.