Acting
Lee Seung-jun
1995-01-13 · Seoul, South Korea
Lee Seung-jun, known mononymously as Seungjun and formerly known as J-Us, is a South Korean singer and lyricist under KI Entertainment. He is a member of the boy group ONF and its OFF team sub-unit.
Known for
Weekly Idol
Can I Step In?
Road to Kingdom
![2026 ONF CONCERT [THE MAP: BEYOND THE HORIZON]](https://image.tmdb.org/t/p/w342/vQmZPhEa8KrUCwrqRqMpl9pube9.jpg)
2026 ONF CONCERT [THE MAP: BEYOND THE HORIZON]
![2025 ONF CONCERT [THE MAP:STRANGER’S PATH]](https://image.tmdb.org/t/p/w342/pvF5lXWpkD3HuDDJSXeXtKXlZD1.jpg)
2025 ONF CONCERT [THE MAP:STRANGER’S PATH]
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2](https://image.tmdb.org/t/p/w342/whume1STRxwi0EVBYU8ZMk669nG.jpg)
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1](https://image.tmdb.org/t/p/w342/zyN3yVwFR1NoZGgxd77aZ4etce7.jpg)
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1
![온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 2](https://image.tmdb.org/t/p/w342/6DhiTgCYAg09SDRLGCktfByp6xD.jpg)
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 2
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 1
![ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE]](https://image.tmdb.org/t/p/w342/4wjPi5x2igYJI9jrbE5QcJhSW8X.jpg)
ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE]
![ONF [FOCUS ON AND OFF]](https://image.tmdb.org/t/p/w342/Au7UBGXv8opgUV1V7lUzl4Bu2i2.jpg)
ONF [FOCUS ON AND OFF]
Dive Into ONF
The Silence Of IDOL
Idol Radio
Star Road
Movie credits · 7
2026 ONF CONCERT [THE MAP: BEYOND THE HORIZON]
2025 ONF CONCERT [THE MAP:STRANGER’S PATH]
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 2
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 1
ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE]
TV credits · 8
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