He was a temporary replacement for Amber for the photoshoot in Petite France (Gapyeong, Gyeonggi Province).
Kim then made his first variety appearance on MBC's 2011 Idol Star Athletics Championships.
He was on Team A with label-mates Shinee, Super Junior, TRAX, and The Grace - Dana & Sunday [1] In 2011, Kim starred in the musical Singin' In The Rain as Donghyun.
[2] In 2012 he starred in his second musical Fantasy Couple as Jang Chul Soo with label-mate Sunday of The Grace.
[3][4] In July 2012, Kim was confirmed to play Na Chul Soo in To the Beautiful You, the Korean adaptation of Hana-Kimi.