The main cast of the 1941 film "How Green Was My Valley" includes:

• Roddy McDowall as Huw Morgan (youngest son)
• Walter Pidgeon as Mr. Merddyn Gruffydd, the village pastor
• Maureen O'Hara as Angharad Morgan, Huw's older sister
• Donald Crisp as Gwilym Morgan, Huw's father
• Sara Allgood as Mrs. Beth Morgan, Huw's mother
• Anna Lee as Bronwen, Huw's sister-in-law
• Patric Knowles as Ivor Morgan, Huw's eldest brother
• John Loder as Ianto Morgan, Huw's second eldest brother
• Barry Fitzgerald as Cyfartha, boxing manager
• Rhys Williams as Dai Bando, boxer
• Morton Lowry as Mr. Jonas, schoolmaster
• Arthur Shields as Mr. Parry, deacon
• Frederick Worlock as Dr. Richards
• Richard Fraser as Davy Morgan
• Evan S. Evans as Gwilym Morgan Jr., Huw's brother
• James Monks as Owen Morgan, Huw's brother

This cast depicts the Morgan family and people in their Welsh mining village during the late Victorian era.