| Dermot O'Leary | ... | Himself - Presenter | |
| Simon Cowell | ... | Himself - Judge | |
| Cheryl Cole | ... | Herself - Judge | |
| Dannii Minogue | ... | Herself - Judge | |
| Louis Walsh | ... | Himself - Judge | |
| Brian Friedman | ... | Himself - Creative Director | |
| Miley Cyrus | ... | Herself - Special Guest | |
| rest of cast listed alphabetically: | |||
| Alexandra Burke | ... | Herself - Contestant | |
| Yvie Burnett | ... | Herself | |
| Ramon Christian | ... | Principal dancer | |
| Peter Dickson | ... | Himself - Voice Over (voice) | |
| Jack the Lad Swing | ... | Themselves - Contestants (as JLS) | |
| Ruth Lorenzo | ... | Herself - Contestant | |
| Aston Merrygold | ... | Himself / JLS | |
| Eoghan Quigg | ... | Himself - Contestant | |
| Diana Vickers | ... | Herself - Contestant | |
| Episode Crew |
Produced by | |||
| Georgie Hurford-Jones | .... | executive producer | |
| Daniel Norris | .... | assistant producer | |
Film Editing by | |||
| Tom Jarvis | (online editor) | ||
| Dan Mellow | |||
Production Design by | |||
| Florian Wieder | (original production designer) | ||
Sound Department | |||
| Damian Reynolds | .... | dubbing mixer | |
Visual Effects by | |||
| Florian Wieder | .... | screen designer | |
Camera and Electrical Department | |||
| Paul Surgison | .... | lighting technician | |
| Chris Yates | .... | senior cameraman | |
| Sam Bishop | .... | jimmy jib rigger (uncredited) | |
Editorial Department | |||
| Nik O'Dell | .... | vt editor | |
Other crew | |||
| Lauren Bissett | .... | production team | |
| Holly Gray | .... | assistant floor manager | |
| Rob Pearson | .... | creative researcher (as Robert Pearson) | |
| Jonathon Ridgard | .... | creative researcher | |
| Main series | Episode guide | Full cast and crew |
| IMDb TV section | IMDb Music section |