Richard Burton

as King Mark of Cornwall

Kate Mulgrew

as Isolt

Nicholas Clay

as Tristan

Cyril Cusack

as Gormond of Ireland

Geraldine Fitzgerald

as Bronwyn

Niall Tóibín

as Andred

Diana Van der Vlis

as Alix

Niall O'Brien

as Corvenal

Kathryn Dowling

as Yseult of the White Hand

John Jo Brooks

as Father Colm

Trudy Hayes

as Anne

John Scanlon

as Bishop

Bobby Johnson

as William the Guard

John Labine

as Eoghanin