| 角色 | 饰演者 | 角色介绍 |
| Percy Jackson | 罗根·勒曼 | |
| Grover Underwood | 布兰登·T·杰克逊 | |
| Annabeth Chase | 亚历珊德拉·达达里奥 | |
| Zeus | 肖恩·宾 | |
| Hermes | 内森·菲利安 | |
| Dionysus | 斯坦利·图齐 | |
| Luke | 杰克·阿贝尔 | |
| Gray Sister | 米西·派勒 | |
| Clarisse | 莱文·兰宾 | |
| Chiron | 安东尼·海德 | |
| Polyphemus / Laistrygonian | 罗伯特·梅耶 | |
| Tyson | 道格拉斯·史密斯 | |
| Gray Sister | 伊薇特·尼科尔·布朗 | |
| Cyclops | 德里克·梅耶斯 | |
| Chris Rodriguez | 格瑞·达蒙 | |
| Gray Sister | 玛丽·伯德桑 | |
| Thalia Grace | Paloma Kwiatkowski | |
| Young Annabeth | Alisha Newton | |
| Cyclops | 艾力克斯·保诺维奇 | |
| Reardon | Christopher Redman | |
| Young Thalia | Katelyn Mager | |
| Ethan Nakamura | Danny Le Boyer | |
| Young Grover | Bjorn Yearwood | |
| Ichneutae | Jordan Weller | |
| Young Luke | Samuel Braun | |
| Ganymede | Richard Yearwood | |
| Customer | Maxine Miller | |
| Barista | Anthony Shim | |
| Lydian Drakon | David Mylrea | |
| Barista | Camille Atebe | |
| Tereus | Connor Dunn | |
| Half-Blood Demigod Teen (uncredited) | Andrew Plaisance | |
| Demigod (uncredited) | Artin John Tsambazis | |
| Oracle (voice) | 索瑞·安达斯鲁 | |
| George (voice) | 克雷格·罗宾逊 | |
| Polyphemus (voice) | 朗·普尔曼 | |
| Martha (voice) | 奥克塔维亚·斯宾瑟 | |
| Kronos | 罗伯特·克耐普 | |
| Additional Voices (voice) (uncredited) | Hanna Frankel |
