What is the main characters in the Tristan and isolde?

The main characters are Tristan [James Franco] the adopted son of the King, & Isolde [Sophia Myles] the daughter of the Irish King, & Marke [Rufus Sewell] the English King. It's the immensely moving story of an inspiring, painful Love-triangle .. between Tristan, Isolde & Marke set in England & Ireland amidst the invasions of the Irish Warlords ..