| Michiel Huisman | Steven Crain
(credit only) |
| Carla Gugino | Olivia Crain |
| Henry Thomas | Young Hugh Crain |
| Elizabeth Reaser | Shirley Crain
(credit only) |
| Oliver Jackson-Cohen | Luke Crain |
| Kate Siegel | Theodora Crain
(credit only) |
| Victoria Pedretti | Nell Crain |
| Lulu Wilson | Young Shirley |
| Mckenna Grace | Young Theo |
| Paxton Singleton | Young Steven |
| Julian Hilliard | Young Luke |
| Violet McGraw | Young Nell |
| Timothy Hutton | Hugh Crain
(credit only) |
| Annabeth Gish | Mrs. Dudley |
| Katie Parker | Poppy Hill
(as Catherine Parker) |
| Olive Elise Abercrombie | Abigail |
| Polly Craig | Older Poppy |
| Mimi Gould | Older Hazel |
| Fedor Steer | William Hill |