What's Wrong with Secretary Kim (2018) — Cast
Cast
| Kim Hye-ok | Choi |
| Lee Yoo-jun | Chi Chi |
| Park Min-young | So |
| Seo Hyo-rim | Melartin's Wife |
| Kim Ji-Yu | So |
| Kim Byeong-ok | CEO |
| Kim Ye-won | Seol |
| Heo Soon-mi | Mal |
| Hwang Chan-sung | Jjak Gwi |
| Park Seo-jun | Lee |
| Kim Jung-woon | Park Ranger |
| Lee Jung-min | Lee |
| Pyo Ye-jin | Unis Kim |
| Hwang Bo-ra | Ra |
| Bae Gang-Yoo | Lee |
| Kang Ki-young | Byeong-sik |
| Moon Woo-jin | Lee |
| Kang Hong-suk | Yang |
| Baek Eun-hae | Pil |
| Lee Tae-hwan | Lee |
Crew
| Seola | Theme Song Performance |
| Jo Jin-ho | Theme Song Performance |
| Mun Sung-nam | Compositor |
| Paek Sun-woo | Writer |
| Rothy | Theme Song Performance |
| Jung Eun-young | Screenplay |
| Choi Ji-young | Co-Director |
| Kim Na-young | Theme Song Performance |
| Jeong Se-woon | Theme Song Performance |
| KIHYUN | Theme Song Performance |
| Jang Jung-do | Executive Producer |
| Yoo Jong-sun | Director |
| Jung Kyung Yoon | Comic Book |
| Kang Sook | Storyboard |
| Yoon Ddan Ddan | Theme Song Performance |
| Park Joon-hwa | Director |
| Choi Bo-rim | Writer |
| Seogi | Theme Song Performance |
| Song Yu-vin | Theme Song Performance |