She had her first kiss with Yeo Jin Goo for their drama "Missing You". It was both their first kiss.
Kim So-Hyun was born in Australia. She moved to South Korea when she was seven years old.
In December 2015, she launched her own one-person agency, E&T Story Entertainment, in partnership with LOEN Entertainment.
In January 2018, the Pyeongchang Organizing Committee for the 2018 Olympic & Paralympic Winter Games chose Kim as the National Representative of Honorary Smile to represent Korea's smile and kindness along with Yoo Seung-min.
She learned how to play piano from her drama "Page Turner".