The story is about Iris's rise to the apex of a love/power triangle that includes her roguish English lover, McHeath, and Art, an earnest young boxer. Within the flawed moral landscape, each character struggles to establish their sovereignty.
| Actor | Role |
|---|---|
 Rose ByrneIris | Iris |
 Hugo WeavingMcHeath | McHeath |
 Matthew Le NevezArt Walker (as Matt Le Nevez) | Art Walker (as Matt Le Nevez) |
 Tyler CoppinDonnie | Donnie |
 John BatchelorRonnie | Ronnie |
 Pia MirandaDaisy | Daisy |
 Kuni HashimotoHackett | Hackett |
 Luke CarrollAlby O'Shea | Alby O'Shea |
| AAndrew NolteThe Subjects Trumpet | The Subjects Trumpet |
| DDaniel PottsThe Subjects Bass | The Subjects Bass |
| CChris WoodThe Subjects Banjo | The Subjects Banjo |
| BBraydon ChlowThe Subjects Drummer | The Subjects Drummer |
| JJohn LakosArt's Corner Man | Art's Corner Man |
| BBrendan GuerinMike Flynn | Mike Flynn |
 Don BridgesGreyhound Eddie | Greyhound Eddie |
| GGraham MurrayReferee #1 | Referee #1 |
 Kodi Smit-McPheeJimmy | Jimmy |
| JJesse RowlesUndercard Boxer #2 | Undercard Boxer #2 |
| BBob MurdochRoy | Roy |
 Mark RaynerDelaney | Delaney |