The true story of Neil and Ivan McCormick, two Irish brothers who attempt to become rock stars but can only look on as their high school friends U2 become the biggest band in the world.
| Actor | Role |
|---|---|
 Ben BarnesNeil McCormick | Neil McCormick |
 Robert SheehanIvan McCormick | Ivan McCormick |
 Pete PostlethwaiteKarl | Karl |
 Krysten RitterGloria | Gloria |
 Ralph BrownLeo | Leo |
 Justine WaddellDanielle | Danielle |
 Luke TreadawayNick | Nick |
 Martin McCannBono | Bono |
 Peter SerafinowiczHammond | Hammond |
 Hugh O'ConorGary | Gary |
 Lisa McAllisterErika | Erika |
 Stanley TownsendDanny Machin | Danny Machin |
| JJohn PrudhontFrankie | Frankie |
 Mark GriffinThe Edge | The Edge |
| SSam CorryPaul McGuinness | Paul McGuinness |
 Seán DoyleLarry Mullen Jr. | Larry Mullen Jr. |
 Joni KamenJoss | Joss |
 Sean DugganLiam | Liam |