[2] Ki made his first onscreen appearance in the 2015 movie C'est si bon.
[3][4] In December 2016, Ki was confirmed to cast in MBC's upcoming historical drama The King in Love as the character Jang-eui, a 'shadow guards' who secretly protect crown prince 'Wang Won'.
[5][6] In August 2018, Ki was confirmed to cast in MBC's drama Dae Jang-Geum is Watching.
[7][8] In May 2019, Ki has been confirmed to cast in tvN's upcoming drama Arthdal Chronicles as the character Yangcha, the youngest member of the Daekan unit and a mysterious character who always wears a mask.
[11][12] In December 2020, Ki confirmed to cast as the male lead in upcoming web drama Scripting Your Destiny.