| Name | Type | Role | |
|---|---|---|---|
| Jin | Musical Guest | BTS - Jin | |
| Myoui Mina | Musical Guest | Twice - Mina | |
| Yoo Yeon-jung | Musical Guest | I.O.I - Yeonjung | |
| Hwang Eun-bi | Musical Guest | GFriend - SinB | |
| Kim Ye-won | Musical Guest | GFriend - Umji | |
| Jang Su-won | Musical Guest | Sechs Kies - Jang Su-won | |
| Jung Eun-bi | Musical Guest | GFriend - Eunha | |
| Chou Tzuyu | Musical Guest | Twice - Tzuyu | |
| Kim Ye-rim | Musical Guest | Red Velvet - Yeri | |
| Wen Junhui | Musical Guest | Seventeen - Jun | |
| Lee Byung-yoon | Musical Guest | BewhY | |
| Kim Se-jeong | Musical Guest | I.O.I - Sejeong | |
| Moon Byul | Musical Guest | Mamamoo - Moonbyul | |
| Joshua Hong | Musical Guest | Seventeen - Joshua | |
| Ennik Somi Douma | Musical Guest | I.O.I - Somi | |
| Eun Ji-won | Musical Guest | Sechs Kies - Eun Ji-won | |
| Solar | Musical Guest | Mamamoo - Solar | |
| Kim Han-bin | Musical Guest | iKon - B.I | |
| Rosé | Musical Guest | Blackpink - Rosé | |
| SUGA | Musical Guest | BTS - Suga | |
| Lee Ji-hoon | Musical Guest | Seventeen - Woozi | |
| Woo Ji-ho | Musical Guest | Zico | |
| Jung Kook | Musical Guest | BTS - Jungkook | |
| Kang Sung-hoon | Musical Guest | Sechs Kies - Kang Sung-hoon | |
| Im Na-young | Musical Guest | I.O.I - Nayoung | |
| Chen | Musical Guest | EXO - Chen | |
| Park Soo-young | Musical Guest | Red Velvet - Joy | |
| Jeon Won-woo | Musical Guest | Seventeen - Wonwoo | |
| Park Ji-hyo | Musical Guest | Twice - Jihyo | |
| Jung Chae-yeon | Musical Guest | I.O.I - Chaeyeon | |
| Kai | Musical Guest | EXO - Kai | |
| Xiumin | Musical Guest | EXO - Xiumin | |
| Im Na-yeon | Musical Guest | Twice-Nayeon | |
| Baekhyun | Musical Guest | EXO - Baekhyun | |
| DK | Musical Guest | iKon - DK | |
| Song Yun-hyeong | Musical Guest | iKon - Song | |
| Kim Da-hyun | Musical Guest | Twice - Dahyun | |
| Kwon Jung-yeol | Musical Guest | 10cm - Kwon Jung-yeol | |
| Kang Mi-na | Musical Guest | I.O.I - Mina | |
| Bae Joo-hyun | Musical Guest | Red Velvet - Irene | |
| Kim Ji-soo | Musical Guest | Blackpink - Jisoo | |
| Kim Jae-duck | Musical Guest | Sechs Kies - Kim Jae-duck | |
| Zhou Jieqiong | Musical Guest | I.O.I - Jieqiong | |
| Choi Yu-na | Musical Guest | GFriend - Yuju | |
| Kim Ji-won | Musical Guest | iKon - Bobby | |
| Lee Seok-min | Musical Guest | Seventeen - DK | |
| Hwasa | Musical Guest | Mamamoo - Hwasa | |
| Yoo Jeong-yeon | Musical Guest | Twice - Jeongyeon | |
| Lalisa Manobal | Musical Guest | Blackpink - Lisa | |
| Jung Ye-rin | Musical Guest | GFriend - Yerin | |
| Hansol Vernon Chwe | Musical Guest | Seventeen - Vernon | |
| Lee Jai-jin | Musical Guest | Sechs Kies - Lee Jai-jin | |
| Jimin | Musical Guest | BTS - Jimin | |
| Jung Chan-woo | Musical Guest | iKon - Chan | |
| Kim Jin-hwan | Musical Guest | iKon - Jay | |
| Xu Minghao | Musical Guest | Seventeen - The8 | |
| Choi Seung-cheol | Musical Guest | Seventeen - S.Coups | |
| j-hope | Musical Guest | BTS - J-Hope | |
| Doh Kyung-soo | Musical Guest | EXO - D.O. | |
| Sehun | Musical Guest | EXO - Sehun | |
| Jeong Eun-ji | Musical Guest | Jung Eun-ji | |
| Choi Yoo-jung | Musical Guest | I.O.I - Yoojung | |
| Suho | Musical Guest | EXO - Suho | |
| Son Seung-wan | Musical Guest | Red Velvet - Wendy | |
| Boo Seung-kwan | Musical Guest | Seventeen - Seungkwan | |
| RM | Musical Guest | BTS - RM | |
| Hirai Momo | Musical Guest | Twice - Momo | |
| Kim So-hye | Musical Guest | I.O.I - Sohye | |
| V | Musical Guest | BTS - V | |
| Jung Whee-in | Musical Guest | Mamamoo - Wheein | |
| BTS | Musical Guest | ||
| Chanyeol | Musical Guest | EXO - Chanyeol | |
| Koo Jun-hoe | Musical Guest | iKon - Ju-ne | |
| Kwon Soon-young | Musical Guest | Seventeen - Hoshi | |
| Kim So-jung | Musical Guest | GFriend - Sowon | |
| Son Chae-young | Musical Guest | Twice - Chaeyoung | |
| Yoon Jeong-han | Musical Guest | Seventeen - Jeonghan | |
| Kim Jennie | Musical Guest | Blackpink - Jennie | |
| Kim Chan-mi | Musical Guest | I.O.I - Chungha | |
| Lay Zhang | Musical Guest | EXO - Lay | |
| Kim Do-yeon | Musical Guest | I.O.I - Doyeon | |
| Kim Min-gyu | Musical Guest | Seventeen - Mingyu | |
| Kang Seul-gi | Musical Guest | Red Velvet - Seulgi | |
| Lee Chan | Musical Guest | Seventeen - Dino | |
| Joo Woo-jae | Guest Star | ||
| Song Hae-na | Guest Star | Herself | |
| Kim Min-ji | Guest Star | ||
| Park Na-rae | Guest Star | ||
| Kim Jae-young | Guest Star | ||
| Yang Se-chan | Guest Star | ||
| Tony Ahn | Guest Star | ||
| Lee Yoo-young | Guest Star | ||
| Kim You-jung | Guest Star | ||
| Kim Jin-kyung | Guest Star | ||
| Lee Ho-jung | Guest Star | ||
| Kim Ji-won | Guest Star | ||
| Kim Ye-won | Guest Star | ||
| Kim Bum | Guest Star | ||
| Cao Lu (Fiestar) | Guest Star | ||
| Gong Seung-yeon | Guest Star | ||
| Danny Ahn | Guest Star | ||
| Gong Myoung | Guest Star | ||
| Lee Se-young | Guest Star | ||
| Ji Soo | Guest Star | ||
| Park So-hyun | Guest Star | ||
| Son Ho-young | Guest Star | ||
| Seo Yu-ri | Guest Star |