Kim Dong-hyun (born 12 February 1989), also known mononymously as Donghyun, is a South Korean actor, model and singer.

He is known for his leads roles in dramas such as The Miracle, Good Morning Double-Decker Bus and The 1km Distance Between Us.

[citation needed] He completed his studies in Myongji University.

[citation needed] Donghyun and his bandmates made their acting debuts in the 2013 Japanese idol drama GOGO Ikemen 5.

[citation needed] He also starred in the 2016 Korean television drama The Miracle.