Doh Kyung-soo (도경수; 1993-yil 12-yanvarda tug'ilgan), professional nomi D.O. (디오) sifatida tanilgan, Janubiy Koreyalik qo'shiqchi va aktyor bo'lib, SM Entertainment ostida faoliyat yuritadi. U Janubiy Koreyaning EXO boy guruhining a'zosi va uning sub-guruhi EXO-K ning a'zosi hisoblanadi. Guruhining faoliyatidan tashqari, D.O. turli televizion dramalarda va filmlarda rol o'ynagan, jumladan, Pure Love (2016), My Annoying Brother (2016), Positive Physique (2016), Room No.7 (2017), 100 Days My Prince (2018), Along with the Gods: The Two Worlds, Swing Kids (2018) va Bad Prosecutor (2022). U 2021-yil 26-iyulda Empathy nomli birinchi mini albomi bilan solo debyutini amalga oshirdi.
