Kevin McKidd Lucius Vorenus Actor Ray Stevenson Titus Pullo Actor Polly Walker Atia of the Juli Actor James Purefoy Mark Antony Actor Tobias Menzies Marcus Junius Brutus Actor Lindsay Duncan Servilia of the Junii Actor Max Pirkis Gaius Octavian Actor Kerry Condon Octavia of the Julii Actor Lyndsey Marshal Cleopatra Actor Zuleikha Robinson Gaia Actor Simon Woods Gaius Octavian Caesar Actor Allen Leech Marcus Vipsanius Agrippa Guest Star Alex Wyndham Gaius Maecenas Guest Star Ian McNeice Newsreader Guest Star Michael Nardone Mascius Guest Star Coral Amiga Vorena the Elder Guest Star Esther Hall Lyde Guest Star Manfredi Aliquo Castor Guest Star Charlie Anson Emmissary Guest Star Lidia Biondi Merula Guest Star Richard Dillane Centurion Vallo Guest Star Matthew Eggleton Egyptian Courtier Guest Star Alice Henley Livia Drusilla Guest Star Kathryn Hunter Charmian Guest Star Sara Kestelman The Old Witch Guest Star Deborah Moore Alfidia Guest Star Bruno Heller Executive Producer William J. Macdonald Executive Producer John Milius Executive Producer Anne Thomopoulos Executive Producer Frank Doelger Executive Producer Lucy Richer Executive Producer