 | Kai als Himself |
 | Song Min Jae als Little Kai |
| Yoo Jae Sang als Kai's Father |
| Choi Hye Jung als Kai's Mother |
| Nam Ki Ppum als Junior Tech Guy |
| Do Hyun als Junior Tech Girl |
| Nam Won Hee als Personal Assistant |
| Lee Yeon Ji als Make-Up |
| Yook Hyo Myung als Game Show Host |
| Ahn Bok Ja als Game Show Old Lady |
| Yeo Sung Soo als Other Player |
| Park Jung Soo als Pansori Singer |
| Hwang Gyu Chang als Pansori Drummer |
| godcolony | Music |
| James Graley | Producer |
| Jung Jong Ho | Sound Technical Supervisor |
| Naejoo Park | Hairstylist |
| Jae Gwang Park | Gaffer |
| Hamin Kim | First Assistant Art Direction |
| Gunhui Kim | First Assistant Camera |
| Oian Arteta | Production Designer |
| Ben Vince | Additional Music |
| Jinwook Lee | Location Manager |
| Nam Ji Soo | Makeup Artist |
| Tom Heddy | Sound Designer |
| Cha Soon Ho | First Assistant Camera |
| Sergio Herrero | VFX Supervisor |
| Yunsu Hyun | Makeup Artist |
| Joe Bolger | Editorial Production Assistant |
| Mihawk Back | Choreographer |
| Phil Currie | Editor |
| Lew Grade | Sound Mixer |
| Julia Park | Producer |
| Kimi Kim | Executive Producer |
| Han Seung Hwan | Casting Director |
| Coralie Rose | Additional Casting |
| Lucy Luscombe | Director |
| Rebecca Mason | Creative Director |
| Ned Sisson | Sound Editor |
| William Pope | Editorial Production Assistant |
| Laura Smith | Post Producer |
| Adam Welch | Script Editor |
| Xavi Trilla | VFX Production Coordinator |
| Giuseppe Favale | Director of Photography |
| Seunggyu Kim | Key Production Assistant |
| Cho Hea Kim | Art Direction |
