Jang Dae Hyeon (장대현) is a South Korean rapper, singer, and songwriter under OUI Entertainment. He participated in the hit boy group survival show "Produce 101 Season 2". Despite being eliminated in the fifth episode, Dae Hyeon was able to debut as a member of the temporary project group "RAINZ" on October 12, 2017. After the group's disbandment on October 28, 2018, Daehyeon made his solo debut with the digital single "Feel Good".
In 2020, Dae Hyeon was revealed to be the leader of OUI Entertainment's newest boy group WEi.
Daehyeon debuted as the leader of WEi in October 2020, with the mini-album "Identity : First Sight".