His older sister, JOO, is an artist under JYP Ent.
Become true fan of Jung Ilhoon to write a fan message
I MISS YOU HBY~
OPPA!!! I REALLY LIKE UNRIPE APPLE!!!
YOU'RE SO AWESOME!!!!!!!!
HOPE YOU'RE MINE FOR REAL~
rapping is as good as always!
i feel like you're the maknae instead of Sungjae! but i love both of you!