Lee Seungjoon
Acting
Born 1995-01-13
Seoul, South Korea
Biography
Lee Seung Jun, better known by his stage name J-US, is the leader, vocalist and dancer of the boy group ONF. On December 27, 2021, he enlisted as an active-duty soldier.
Known For
Popular credits
Weekly Idol
Self
Can I Step In?
Kwon Sang Hae
Road to Kingdom
Self - Contestant
![2025 ONF CONCERT [THE MAP:STRANGER’S PATH]](https://image.tmdb.org/t/p/w154/pvF5lXWpkD3HuDDJSXeXtKXlZD1.jpg)
2025 ONF CONCERT [THE MAP:STRANGER’S PATH]
SEUNGJUN
![2026 ONF CONCERT [THE MAP: BEYOND THE HORIZON]](https://image.tmdb.org/t/p/w154/vQmZPhEa8KrUCwrqRqMpl9pube9.jpg)
2026 ONF CONCERT [THE MAP: BEYOND THE HORIZON]
SEUNGJUN
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1](https://image.tmdb.org/t/p/w154/zyN3yVwFR1NoZGgxd77aZ4etce7.jpg)
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1
SEUNGJUN
![온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 1](https://image.tmdb.org/t/p/w154/6DhiTgCYAg09SDRLGCktfByp6xD.jpg)
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 1
SEUNGJUN
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 2
SEUNGJUN
![ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE]](https://image.tmdb.org/t/p/w154/4wjPi5x2igYJI9jrbE5QcJhSW8X.jpg)
ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE]
SEUNGJUN
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2](https://image.tmdb.org/t/p/w154/whume1STRxwi0EVBYU8ZMk669nG.jpg)
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2
SEUNGJUN
Idol Radio
Special DJ
![ONF [FOCUS ON AND OFF]](https://image.tmdb.org/t/p/w154/Au7UBGXv8opgUV1V7lUzl4Bu2i2.jpg)
ONF [FOCUS ON AND OFF]
SEUNGJUN
Dive Into ONF
J-US
Star Road