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![ONF [FOCUS ON AND OFF]](https://image.tmdb.org/t/p/w300/Au7UBGXv8opgUV1V7lUzl4Bu2i2.jpg)
![온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 1](https://image.tmdb.org/t/p/w300/6DhiTgCYAg09SDRLGCktfByp6xD.jpg)
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1](https://image.tmdb.org/t/p/w300/zyN3yVwFR1NoZGgxd77aZ4etce7.jpg)
![온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2](https://image.tmdb.org/t/p/w300/whume1STRxwi0EVBYU8ZMk669nG.jpg)
![2026 ONF CONCERT [THE MAP: BEYOND THE HORIZON]](https://image.tmdb.org/t/p/w300/vQmZPhEa8KrUCwrqRqMpl9pube9.jpg)
Lee Seungjoon
ActingBorn January 13, 1995 (31 years old)
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.
Also known as: J-US, 제이어스, 이승준, Lee Seung Jun
Popularity: 0
Total credits: 14
Known For
TV
★0.0
Idol Radio
as Special DJ
TV
★6.8
Weekly Idol
as Self
TV
★0.0
Star Road
TV
★9.4
Road to Kingdom
as Self - Contestant
TV
★4.1
Can I Step In?
as Kwon Sang Hae
TV
★0.0
ONF [FOCUS ON AND OFF]
as SEUNGJUN
TV
★0.0
Dive Into ONF
as J-US
Movie
★0.0
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 1
as SEUNGJUN
Movie
★0.0
온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 2
as SEUNGJUN
Movie
★0.0
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1
as SEUNGJUN
Movie
★0.0
온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2
as SEUNGJUN
Movie
★5.0
2026 ONF CONCERT [THE MAP: BEYOND THE HORIZON]
as SEUNGJUN
![2025 ONF CONCERT [THE MAP:STRANGER’S PATH]](https://image.tmdb.org/t/p/w300/pvF5lXWpkD3HuDDJSXeXtKXlZD1.jpg)
![ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE]](https://image.tmdb.org/t/p/w300/4wjPi5x2igYJI9jrbE5QcJhSW8X.jpg)