Oh Se-hun (오세훈; born April 12, 1994), known professionally as Sehun (세훈), is a South Korean singer-songwriter, dancer and actor under SM Entertainment. He is the maknae of the South Korean boy group EXO, its sub-group EXO-K and its sub-unit EXO-SC.

Apart from his group's activities, Sehun has also had supporting roles in various television dramas and films such as Secret Queen Makers (2018) and Now, We Are Breaking Up (2021), and starred in Dokgo Rewind (2018).

吴世勋（오세훈，1994年4月12日-），专业名称为世勋（세훈），是SM娱乐旗下的韩国创作歌手、舞蹈家和演员。他是韩国男团EXO、其子组合EXO-K和子组合EXO-SC的主持人。

除了他的团体活动外，世勋还在各种电视剧和电影中担任配角，例如《秘密女王制造者》（2018 年）和《现在，我们分手了》（2021 年），并出演了《独岛倒带》（2018 年）。