January 13, 1995 (Age: 30)
Seoul, South Korea
Acting
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.
2024
2021
![Poster for 온앤오프(ONF) CONCERT [SPOTLIGHT] IN SEOUL NIGHT 2](https://image.tmdb.org/t/p/w185/6DhiTgCYAg09SDRLGCktfByp6xD.jpg)
![Poster for 온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 2](https://image.tmdb.org/t/p/w185/whume1STRxwi0EVBYU8ZMk669nG.jpg)
![Poster for 온앤오프(ONF) CONCERT [SPOTLIGHT:THE HIDDEN SHADOW] NIGHT 1](https://image.tmdb.org/t/p/w185/zyN3yVwFR1NoZGgxd77aZ4etce7.jpg)
![Poster for ONF 2021 LIVE CONTACT :: CODE #1. [REVERSE]](https://image.tmdb.org/t/p/w185/4wjPi5x2igYJI9jrbE5QcJhSW8X.jpg)