Kim is best friends with Lee Jong Suk, whom he met in his modelling days and co-starred with as on-and-off, and on again best friends in teen drama School 2013. Their friendship has also led to various collaborations together, such as filming commercials and holding photo shoots together. Kim is also close friends with model-actors Kim Young Kwang, Lee Soo Hyuk, Hong Jong Hyun, Sung Joon from their modelling careers and filming of dramas such as White Christmas (TV series) and Vampire Idol together. [28]