Daniel Evans as Manawydan (voice)

Jenny Livsey as Rhiannon (voice)

Matthew Rhys as Lleu Llaw Gyffes (voice)

Gruffydd Davies as Young Lleu (voice)

Sue Jones-Davies as Sian (voice)

Ioan Gruffudd as King Bendigeidfran (voice)

Peter Gruffydd as Math (voice)

Robert Gwyn Davin as Llwyd (voice)

Mali Harries as Cigfa (voice)

Aneirin Hughes as Gronw (voice)

Clare Isaac as Branwen (voice)

Anton Lesser as Teyrnon (voice)

Richard Lynch as Ben (voice)

Philip Madoc as Gwydion (voice)

Paul McGann as King Matholwch (voice)

Richard Mylan as Pryderi (voice)

Jack O'Kelly as Finn (voice)

Lisa Palfrey as Arianrhod (voice)

Meic Povey as Gwyn

Catrin Powell as Elin (voice)

Dilys Price as Llwyd (voice)

Alun Raglan as Efnisien (voice)

Paul Rhys as Lord Pwyll (voice)

Sian Rivers as Blodeuwedd (voice)

Mair Rowlands as Tevrnon's Wife (voice)

Dorien Thomas as William (voice)

William Thomas as Hefeydd (voice)

Menna Trussler as Midwife (voice)

Gwyn Vaughan Jones as Gwawl (voice)

Eilian Wyn as Arawn (voice)

Geraint Wyn as Pendaran (voice)

Michael Povey as Gwyn (voice)

Sion Alun Davies as Young Lleu (voice)

William Thomas as Hefeydd (voice)

Sera Cracroft as (additional voice)

Stephen Armstrong as (additional voice)

Kathryn Dimery as (additional voice)

Richard Elfyn as (additional voice)

John Evans as (additional voice)

Simon Fisher as (additional voice)

Phyl Harries as (additional voice)

Tony Leader as (additional voice)