| Jonathan Rhys Meyers | King Henry VIII |
| Henry Cavill | Charles Brandon |
| Sarah Bolger | Mary Tudor |
| Max Brown | Edward Seymour |
| David O'Hara | Henry Howard, Earl of Surrey |
| Joely Richardson | Catherine Parr |
| Anthony Brophy | Ambassador Bishop Chapuys |
| Simon Ward | Bishop Gardiner |
| Selma Brook | Brigitte |
| Frank McCusker | Risley |
| Rod Hallett | Richard Rich |
| Bronson Webb | Forager |
| Jody Latham | Harry Hurst |
| Daniel Caltagirone | Girolamo de Treviso |
| David Michael Scott | Mine Tunnel Officer |
| Andy Kellegher | English Soldier |
| Ian Saynor | Surgeon General |
| Suzy Lawlor | Anne Parr |
| Elliot Moriarty | Queen's secretary |
| Owen Aaronovitch | Monsieur Rousselot |
| Moe Dunford | Richard Leland |
| Laoise Murray | Lady Elizabeth |
| Eoin Murtagh | Prince Edward |
| Jane Brennan | Lady Bryan |
| Maude Hirst | Kat Ashley |
| Art Kearns | Miner |
| Eoin Macken | English Officer #1 |
| Aiden Condron | English Officer #2 |
| Duncan Duff | Governor of Boulogne |
| Aisling Holian | Catherine Parr's Lady in Waiting |
| Natasha Quirke | Catherine Parr's Lady in Waiting |
| Eoin Bates | Flag Carrying Solider |