| Will Smith | | Lance |
| Tom Holland | | Walter |
| Ben Mendelsohn | | Killian |
| Rashida Jones | | Marcy |
| Karen Gillan | | Eyes |
| DJ Khaled | | Ears |
| Reba McEntire | | Joyless |
| Rachel Brosnahan | | Wendy |
| Masi Oka | | Kimura |
| Carla Jimenez | | Geraldine |
| Mark Ronson | | Agency Control Room Technician |
| Michi Yamato | | Yakuza #4 |
| Toru Uchikado | | Yakuza #1 |
| Hiroshi Otaguro | | Yakuza #5 |
| Hisato Masuyama | | Yakuza #2 |
| Toshiya Agata | | Yakuza #3 |
| Tawny Newsome | | Agency Employee #1 |
| JB Blanc | | Agency Employee #2 / Marcy's Agent #3 |
| Claire Crosby | | Unitee |
| Adrian Gonzalez | | Agency Employee #3 / Marcy's Agent #1 |
| Jarrett Bruno | | Young Walter / Pigeon Voice |
| William Christopher Stephens | | Agency Employee #4 / Marcy's Agent #5 |
| Bex Marsh | | Agency Employee #5 / Female Tourist |
| Peter S. Kim | | Agency Employee #6 / Joon / Marcy's Agent #4 |
| Gabriel Conte | | Agency Employee #7 |
| Jess Conte | | Agency Employee #8 |
| Rashawn Nadine Scott | | Agency Employee #9 |
| Stefania Spampinato | | Agency Employee #10 / Italian Woman |
| Nick Bruno | | Agency Employee #11 / Pigeon Voice |
| Troy Quane | | Agency Employee #12 |
| Eddie Mujica | | Agency Accountant / Male Tourist |
| Emily Altman | | Lead Agency Lab Tech / Scooter Girl |
| Randy Trager | | Terrance / Pigeon Voice |
| Christopher Campbell | | Marcy's Agent #2 |
| Matthew J. Munn | | Weapons Lab Soldier |
| Kimberly Brooks | | Lance's Car |
| Youn So | | Soo-Min |
| Min-Hyuck Jang | | Joon |
| Randy Thom | | Various Voices / Pigeon Voice |
| Krizia Bajos | | Receptionist |