Jang Hyun-seung was raised in Seoul, South Korea. He has a younger sister named Geurim.[3] His father died in the early morning of September 20, 2012 from a sudden heart attack.[4] He previously appeared in the same episode with Hyunseung on KBS's talk show, Win Win, earlier in 2012 with other fathers of the Beast members.[5][6]
Hyunseung currently attends Dongshin University under a full scholarship, along with 4 other members of Beast. He is majoring in Applied Music. He is nicknamed "4D Prince".[7][