This film follows the remarkable and inspirational true story of Paul Potts, a shy, bullied shop assistant by day and an amateur opera singer by night.
| Actor | Role |
|---|---|
 James CordenPaul Potts | Paul Potts |
 Alexandra RoachJulz | Julz |
 Julie WaltersYvonne | Yvonne |
 Colm MeaneyRoland Potts | Roland Potts |
 Jemima RooperHydrangea | Hydrangea |
 Mackenzie CrookBraddon | Braddon |
 Trystan GravelleMatthew | Matthew |
 Sion Tudor OwenChoirmaster | Choirmaster |
 Alex MacqueenDr. Thorpe | Dr. Thorpe |
 Miriam LuciaSignora Fiorentino | Signora Fiorentino |
 Stanley TownsendLuciano Pavarotti | Luciano Pavarotti |
 Di BotcherNurse | Nurse |
 Jon WenningtonTalent Show Punter (uncredited) | Talent Show Punter (uncredited) |
| OOwen HunteFriend in Bar (uncredited) | Friend in Bar (uncredited) |
| BBrandon WhittBuncle son (uncredited) | Buncle son (uncredited) |
| EEvan WhittBuncle son (uncredited) | Buncle son (uncredited) |
 Valeria BilelloNot listed | Not listed |