| Walter Pidgeon | Mr. Gruffydd, Village Preacher |
| Maureen O'Hara | Angharad Morgan, Eldest Daughter |
| Roddy McDowall | Huw Morgan, Youngest Son |
| Donald Crisp | Mr. Gwilym Morgan |
| Anna Lee | Bronwyn Morgan, Ivor's Wife |
| John Loder | Ianto Morgan |
| Sara Allgood | Mrs. Beth Morgan |
| Barry Fitzgerald | Cyfartha, Dai Bando's Partner |
| Patric Knowles | Ivor Morgan |
| Rhys Williams | Dai Bondo, ex-boxer |
Huw Morgan, the academically inclined youngest son in a proud family of Welsh coal miners, witnesses the tumultuous events of his young life during a period of rapid social change. At the dawn of the 20th century, a miners' strike divides the Morgans: the sons demand improvements, and the father doesn't want to rock the boat. Meanwhile, Huw's eldest sister, Angharad, pines for the new village preacher, Mr. Gruffydd .