Maisie Williams | … | Rahne Sinclair | |
| Anya Taylor-Joy | … | Illyana Rasputin | |
| Charlie Heaton | … | Sam Guthrie | |
| Alice Braga | … | Dr. Reyes | |
| Blu Hunt | … | Dani Moonstar | |
| Henry Zaga | … | Roberto da Costa | |
| Adam Beach | … | Dani’s Father | |
| Thomas Kee | … | Sam’s Father | |
| Colbi Gannett | … | Young Illyana | |
| Happy Anderson | … | Reverend Craig | |
| Dustin Ceithamer | … | Smiling Man | |
| Jacinto Vega SpiritWolf | … | Frozen Cheyenne (as Jacinto ‘Spirit Wolf’ Vega) | |
| Chuck | … | Wolf | |
| Marilyn Manson | … | Smiling Man (voice) | |
| Rest of cast listed alphabetically: | |||
| Jeffrey Corazzini | … | Coal Miner (uncredited) | |
| Mickey Gilmore | … | Coal Miner (uncredited) | |
| Max Schochet | … | Coal Miner (uncredited) |
The new Mutants Cast
1–2 minutes
Info-World-Hub 