- Unknown:
- Maurice Vinden.
- Gwen Jones:
- Curigwen Lewis
- Gwynneth Gwyther:
- Maudie Edwards
- Mary Gwyther:
- Madoline Thomas
- Llewellyn the Choir:
- Ivor Novello
- David Morris:
- Trefor Jones
- Wynford Davies:
- Edward Palmer
- Marged Davies:
- Bettie Bucknelle
- Olwen Davies:
- Glynis Johns
- James Lloyd:
- Elwyn Brook-Jones
- Mair Lloyd:
- Rachel Thomas
- Cliff Lloyd:
- Emrys Jones
- Rev Idris Griffith:
- Mervyn Johns
- A gentle miner:
- Cliff Gordon
- A fierce miner:
- John Glyn Jones
- A negative miner:
- Harry Parry
- Seth:
- Edward Rees
- Iestyn Morgan:
- Tom Williams
- Miners, villagers, etc:
- St. David's Singers
- Written by:
- Cliff Gordon
- Music By:
- George Frederic
- Incidental songs arranged by:
- Hal Evans
- Produced By:
- Gordon Crier
- Chorus:
- BBC Chorus
- BBC Chorus conducted By:
- Leslie Woodgate
- Musicians:
- Augmented BBC Revue Orchestra
- Orchestra:
- conducted by Frank Cantell
- Organist:
- Maurice Vinden
