Achilles (Brad Pitt): Brooding warrior whose quest for immortal fame brings him to Troy even though such a choice also brings his doom.
Agamemnon (Brian Cox): Strongest of the rulers of the Greek City-States. He uses the incident of Helen as an excuse to bring the Greeks to war against Troy.
Briseis (Rose Byrne): Vestal Virgin Priestess of Apollo taken by the Greeks during their invasion. She and Achilles fall in love.
Hector (Eric Bana): Oldest son of King Priam of Troy; champion of Troy.
Helen (Diane Kruger): The most beauty Greek woman, who is promised to Menelaus, but falls in love with Paris and escapes with him to Troy.
Menelaus (Brendan Gleeson): Younger brother of Agamemnon. Helen was promised to him as a wife.
Odysseus (Sean Bean): Veteran Greek, who is known for his wisdom and way with words more so than his sword.
Paris (Orlando Bloom): Younger son of King Priam of Troy, who brings war upon Troy by stealing away Helen.