| Episode credited cast: |
 | Kate Thornton | - | Herself - Presenter |
 | Simon Cowell | - | Himself - Judge |
 | Sharon Osbourne | - | Herself - Judge |
 | Louis Walsh | - | Himself - Judge |
| Rest of cast listed alphabetically: |
| Jonathan Ansell | - | Himself - Contestant (as G4) |
| Steve Brookstein | - | Himself - Contestant (as Steve) |
| Tabby Callaghan | - | Himself - Contestant (as Tabby) |
| Corene Campbell | - | Herself - Contestant (as Voices With Soul) |
| Grace Campbell | - | Herself - Contestant (as Voices With Soul) |
| Hildia Campbell | - | Herself - Contestant (as Voices With Soul) |
| Michael Christie | - | Himself - Contestant (as G4) |
 | Cassie Compton | - | Herself - Contestant (as Cassie) |
 | Mark Hudson | - | Himself |
| Peter Jones | - | Himself - Contestant (as 2 to Go) |
| Emma Paine | - | Herself - Contestant (as 2 to Go) |
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