Do Kyung-soo (Hangul: 도경수; born January 12, 1993), better known by his stage name D.O., is a South Korean singer and actor. He is best known as a member and one of the main vocalists of the South Korean-Chinese boy group Exo. Apart from his group's activities, D.O. has also starred in various television dramas and movies such as Pure Love (2016), My Annoying Brother (2016), Positive Physique (2016), Room No.7 (2017), 100 Days My Prince (2018), Along with the Gods, and Swing Kids (2019).
He is also known as Do Kyung-soo.