| Role | Actor |
|---|---|
| Ariel | Grace Harvey |
| Prince Eric | Hank Jones |
| King Triton | August Nau |
| Sebastian | Ian McGovern |
| Flounder | Finley Walker |
| Scuttle | Drew Dawson |
| Ursula | Alison Keeler |
| Flotsam | Celeste Brown |
| Jetsam | Sophia Gustafson** |
| Grimsby | Chloe Williams |
| Mersister | Chloe Bredice** |
| Mersister | Grace Corwin |
| Mersister | Abigail Fickbohm** |
| Mersister | Mallorie McGuire |
| Mersister | Edie Musgrave |
| Mersister | Eve Wing |
| Pilot/Chef Louis | Cadence Spurgeon |
| Carlotta/Ensemble | Marianne Hintz |
| Ensemble | Jaylynn Agnew |
| Ensemble | Brynn Fuller** |
| Ensemble | Allison Halstead |
| Ensemble | Katelyn Henzi** |
| Ensemble | Lia Hintz** |
| Ensemble | Kylie Jorgensen** |
| Ensemble | Eryn Lenhart |
| Ensemble | Tatum Murphy |
| Ensemble | Cecilia Sherman |
| Ensemble | Teshura Wing |
** = denotes CAP mainstage debut