Seohyun was born on April 28, 1991.
 Her mother was a chairwoman at a piano school and Seohyun was taught how to play piano, as well as violin and traditional Korean drums in her early childhood
In January 2015, Seohyun was cast in the role of Scarlett O'Hara in the Korean version of Autant en emporte le vent, a French musical based on Gone with the Wind

