D.O. (Korean: 디오) is one of the main vocalist of EXO and main vocalist of its sub-group EXO-K, known for his singing skill.[18] Born Do Kyungsoo (Hangul: 도경수; hanja: 都暻秀) on January 12, 1993 (age 22) in Goyang, Gyeonggi Province, South Korea. D.O. has been singing since primary school and was an avid participant in local singing competitions throughout his high school career. In 2010, he was recommended to audition for S.M. Entertainment after winning at a local singing festival. He subsequently became an S.M. Entertainment trainee during his last two years of high school. He performed Na Yoon-kwon's "Anticipation" and Browneyed Soul's "My Story" at his S.M. audition.
D.O. was formally introduced as the eighth member of Exo on January 30, 2012. His stage name is derived from his family name, Do. He sees Yoo Young-jin, S.M.'s music producer, as his role model. On July 29, 2013, he was featured in f(x)'s song "Goodbye Summer", a track from their album Pink Tape. D.O. also had his feature film debut in the movie Cart. He played the role of Han Kang Woo in the Korean drama 'It's Okay, That's Love'.

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Randomthis is a book for newbies to get to know the best Kpop group ever, enjoy and please... be nice to me! this isn't a plagiarism I came up with it~ anyway here!!! it'll be set up oldest to youngest~