Fifth member of the South Korean-Chinese boy band Exo who was born Oh Se-hun. In 2008, he was cast into S.M. Entertainment after auditioning multiple times beforehand.
He appeared in the music video for the single "Twinkle" by Girls' Generation.
He made a guest appearance in the sitcom Royal Villa alongside fellow Exo member Chanyeol.
When he was twelve years old, he was scouted on the streets by a casting agent.
He was born in Seoul, South Korea.