2012: Debut with EXO
He graduated from School of Performing Arts Seoul (SOPA) in February 2012.
On April 1, 2016, local media outlet Dispatch reported that he and Krystal of f(x) were dating and it was confirmed by SM Entertainment on the same day. In June, 2017, SM reported that the couple have broken up due to busy schedules of both sides.
On December 31, 2018, rumors of a possible relationship between he and Jennie of BLACKPINK began to take off when the same local media outlet of the last time posted pictures of the two together on a date, with the information that they also had spent time together in Paris back in October. On January 1, 2019, SM Entertainment confirmed the pair were dating and gave the statement, "Kai and Jennie have become fond of each other". Later that day, YG Entertainment also confirmed the news. On January 25, SM Entertainment revealed that the couple had broken up, but did not reveal the reason for it.
- Andante (KBS1, 2017-2018)
- Spring Has Come (WOWOW, 2018)
- Miracle That We Met (KBS2, 2018)
- Choco Bank (Naver TV Cast, 2016)
- First Seven Kisses (Naver TV Cast, 2016)
- Levi's (2018)
- GUCCI Eyewear (2018)
- Main article: Kai/Gallery
- Newsen: SM 신인티저 공개 두팀 베일벗다, 신비로운 멤버 카이(KAI)만 공개
- Forbes: Super M, 'The Avengers Of K-Pop,' Unveiled By SM Entertainment And Capitol Music Group
- Soompi: EXO's Kai and f(x)'s Krystal CONFIRM They Are Dating
- Soompi: EXO's Kai And f(x)'s Krystal Confirmed To Have Broken Up
- Soompi: EXO's Kai And BLACKPINK's Jennie Reportedly Dating
- Soompi: EXO's Kai And BLACKPINK's Jennie Confirmed To Be Dating
- Soompi: EXO's Kai And BLACKPINK's Jennie Confirm Breakup