| Darsteller | Rolle |
|---|---|
| Alex Lanipekun | Tycho (15) |
| Christine Bottomley | Scribonia (14) |
| Matthew McNulty | Gaius (14) |
| Kasia Smutniak | Livia Drusilla (14) |
| Liah O'Prey | Julia (12) Young Julia (2) |
| Alaïs Lawson | Marcella (14) |
| Ewan Horrocks | Drusus (8) Young Drusus (6) |
| Darrell D'Silva | Piso (13) |
| Ben Batt | Agrippa (12) |
| Joseph Ollman | Iullus (8) Young Iullus (3) |
| Claire Forlani | Octavia (9) |
| Liam Cunningham | Livius (8) |
| David Avery | Domitius (8) |
| Nathan Welsh | Musca (8) |
| Isabelle Connolly | Antonina (8) |
| Mia Jenkins | Ursa (8) |
| Hannah Chinn | Antonia (8) |
| Ethan Moorhouse | Vistilius (8) |
| Joelle | Vipsania (8) |
| Benjamin Isaac | Tiberius (8) |
| Earl Cave | Young Tiberius (6) |
| Peter Campion | Libo (6) |
| Colette Tchantcho | Antigone (6) |
| Roland Litrico | Thelus (6) |
| Lex Shrapnel | Crassus (5) |
| Anthony Barclay | Corvinus (5) |
| Naike Anna Silipo | Prima (5) |
| Kevin Lettieri | Vinnius (5) |
| Emma Canning | Young Antonia (5) |
| Laurel Waghorn | Antonia Minor (5) |
| Beau Gadsdon | Young Antonia (2) Young Antonia Minor (2) |
| Finn Bennett | Marcellus (4) |
| Yuliia Sobol | Gemina (4) |
| Claudia Stecher | Fortunata (4) |
| Enzo Cilenti | Tiberius Nero (2) Tiberius Claudius Nero |
| Alana Boden | Porcia (2) |
| Tom Glynn-Carney | Young Gaius (2) |
| Stephen Lord | Slaver |
| Youssef Kerkour | Maecenas (3) |
| Merch Husey | Young Maecenas (2) Young Meacenas |
| Pedro Leandro | Aprio (3) |
| Melodie Wakivuamina | Young Antigone (3) |
| Meadow Nobrega | Little Livia (3) |
| Salvatore Palombi | Murena (3) |
| Fabrizio Romagnoli | Strabo (3) |
| Elliot Barnes-Worrell | Vilbia (3) |
| Alexandra Moen | Turia (2) |
| Liam Garrigan | Marcus Antonius (2) |
| Anthony Calf | Sabinus (2) |
| Philip Arditti | Primus (2) |
| Greg Hicks | Asprenas (2) |
| Alexandra Moloney | Young Octavia (2) |
| Jack Brett Anderson | Gracchus (2) |
| Tom Forbes | Sextus (2) |
| Oliver Dench | Young Iullus (2) |
| Oliver Huntingdon | Young Agrippa (2) |
| Bailey Spalding | Young Scribonia (2) |
| Annelle Olaleye | Little Antigone (2) |
| Lilit Lesser | Aurelia (2) |
| Isabella Rossellini | Balbina |
| Daniel Caltagirone | Lepidus |
| Gerard Monaco | Dacius |
| Brian McCardie | Cicero |
| David Schaal | Veteran |
| Mark Rowley | Varica |
| Emily Bevan | Herrenia |
| Sergio Basile | Salassus |
| Edmund Wiseman | Elva |
| Dolores Carbonari | Valeria |
| Melissa Di Cianni | Publilia |
| Adelmo Fabo | Archias |
| Nuvoletta Lucarelli | Hilarica |
| Giuditta Niccoli | Alfidia |
| Martina Galletta | Ursula |
| Ettore Marrani | Musa |
| Alex Walton | Gallus |
| Laura Fazio | Prostitute |
| Alexander Mariotti | Self - historical advisor |
| Lenez | Dominii |
| Lucy Reynolds | Taberna Waitress |
| Alessandro Epifani | Aratus |
| Francesco Lonigro | Fat Man |