Lee Seung-hyub is a South Korean singer and actor, best known as the leader of the band N.Flying. Born on 31 October 1992 in Daegu, he writes songs, raps and plays guitar under the stage name J.DON. Drama fans loved him as Baek In-hyuk in Lovely Runner. He is with FNC Entertainment.

He is 181 cm tall, weighs 65 kg, and his blood type is A, according to his published profile.

Early life

He grew up in Daegu with a love for music. He trained at FNC Entertainment and debuted in 2015 as the leader, main rapper and vocalist of N.Flying. He writes many of the band's songs.

Career and breakthrough

N.Flying found big success with the song Rooftop in 2019, which topped Korean charts. While leading the band, he built an acting career, starting with Entertainer in 2016. His warm acting in Nevertheless (2021) and Shooting Stars (2022) brought him closer to drama fans.

Popular roles

His breakthrough came in Lovely Runner (2024), the time-slip romance that became a world hit. As Baek In-hyuk, the hero's best friend and bandmate in Eclipse, he showed perfect comic timing and real musical skill. The same year, he played Bae Dong-jin in Love Next Door.

Recent work

In 2025 he took a leading role in the youth music drama Spring of Youth, playing Seo Tae-yang. Few artists move so easily between rock stages and drama sets, and fans in both worlds cheer for him.