Colin Firth (Aurelius), Ben Kingsley (Ambrosinus / Merlin), Thomas Sangster (Romulus Augustus), Aishwarya Rai (Mira), Peter Mullan (Odoaker), Kevin McKidd (Wulfila), Alexander Siddig (Theodorus Andronikos), John Hannah (Nestor), James Cosmo (Hrothgar), Thomas Brodie-Sangster (Romulus Augustus), Robert Pugh (Kustennin), Nonso Anozie (Batiatus), Rupert Friend (Demetrius), Lee Ingleby (Germanus), Owen Teale (Vatrenus), Iain Glen (Orestes), Harry van Gorkum (Vortigern), Ferdinand Kingsley (junger Ambrosinus), Rory James (junger Artus), Murray McArthur (Tertius), Beata Ben Ammar (Flavia), Trevor Lovell (Orosius), Alexandra Thomas-Davies (Ygraine), Andrew Westfield (Marcallis), Kathleen Segal (flirtendes Mädchen), Ava Sangster (keltisches Mädchen), Robert Brazil (Skorpion-Kommandeur), Ouerghi Chedly (Fischer), Zarrouk Brahim (Sklave)