| Dermot O'Leary | ... | Himself - Presenter | |
| Simon Cowell | ... | Himself - Judge | |
| Cheryl Cole | ... | Herself - Judge | |
| Dannii Minogue | ... | Herself - Judge | |
| Louis Walsh | ... | Himself - Judge | |
| Peter Dickson | ... | Himself - Voice Over (voice) | |
| rest of cast listed alphabetically: | |||
| Ant & Seb | ... | Themselves - Auditionees | |
| Andrew Bridge | ... | Himself - Contestant | |
| Shauna Buckingham | ... | Herself - Contestant | |
| Chaos | ... | Themselves - Contestants | |
| Alexandra Davies | ... | Herself - Contestant | |
| Peter Dockray | ... | Himself - Auditionee | |
| Austin Drage | ... | Himself - Contestant | |
| Dreamtime | ... | Themselves - Auditionees | |
| Mark Gartside | ... | Himself - Auditionee | |
| Aimee Hargreaves | ... | Herself - Contestant | |
| Rachel Hylton | ... | Herself - Contestant | |
| Jack the Lad Swing | ... | Themselves - Contestants (as JLS) | |
| Nikk Mager | ... | Himself - Auditionee | |
| Vicky Maxted | ... | Herself - Auditionee | |
| John May | ... | Himself - Auditionee | |
| Marlon McKenzie | ... | Himself - Contestant | |
| Symmetry | ... | Themselves - Auditionees | |
| Rita Brigitta Zafiriou | ... | Herself - Auditionee | |
| Episode Crew |
Directed by | |||
| Helen Barnes | |||
| Jessica Devlin | |||
| Clara Marshall | |||
| Pete Ogden | |||
| Freddie Sorensen | |||
Produced by | |||
| Helen Barnes | .... | producer | |
| Clair Breen | .... | producer | |
| Lisa Chandarana | .... | associate producer | |
| Jessica Devlin | .... | producer | |
| Siobhan Greene | .... | executive producer: Syco TV | |
| Richard Holloway | .... | executive producer: talkbackTHAMES | |
| Georgie Hurford-Jones | .... | executive producer | |
| Paul Jones | .... | associate producer | |
| Mandy Lee | .... | line producer | |
| Andrew Llinares | .... | executive producer: talkbackTHAMES | |
| Clara Marshall | .... | producer | |
| Daniel Norris | .... | assistant producer | |
| Pete Ogden | .... | producer | |
| Mark Sidaway | .... | series producer | |
| Freddie Sorensen | .... | producer | |
Film Editing by | |||
| Ollie Aslin | (off-line editor) | ||
| Tom Jarvis | (online editor) | ||
| Dan Mellow | |||
Production Design by | |||
| Florian Wieder | (original production designer) | ||
Makeup Department | |||
| Julia Carta | .... | makeup artist (as Julia Irwin Carta) | |
| Eve Collins | .... | stylist: Dermot | |
| Justine Jenkins | .... | makeup artist | |
| Lisa Laudat | .... | makeup artist | |
| Patricia O'Neill | .... | makeup artist | |
| Christian Vermaak | .... | makeup artist | |
Production Management | |||
| Leilah Mason | .... | production manager | |
Art Department | |||
| Florian Wieder | .... | set designer | |
Sound Department | |||
| Dan Chapman | .... | dubbing mixer | |
| Sean Taylor | .... | sound supervisor | |
Visual Effects by | |||
| Florian Wieder | .... | screen designer | |
Camera and Electrical Department | |||
| Nick Brown | .... | camera operator | |
| Nat Hill | .... | senior lighting cameraman | |
| Dan Studley | .... | camera operator | |
| Chris Yates | .... | senior cameraman | |
Editorial Department | |||
| Phil Box | .... | off-line editor | |
| Louise Channing | .... | post-production coordinator | |
| Dylan Chase | .... | off-line editor | |
| Tim Clack | .... | off-line editor | |
| Paul Claydon | .... | off-line editor | |
| Dan Evans | .... | on-line editor | |
| Mark Hardyman | .... | off-line editor | |
| Dan Mellow | .... | off-line editor | |
| Nik O'Dell | .... | vt editor | |
| Emlyn Pugh | .... | off-line editor | |
| Andy Thomas | .... | off-line editor | |
Music Department | |||
| Simon Cowell | .... | composer: theme music | |
| Jos Jorgensen | .... | composer: theme music | |
| Andy Love | .... | composer: theme music | |
| Ashley Tabor | .... | composer: theme music | |
Other crew | |||
| Tony Adkins | .... | production team | |
| Harpreet Baines | .... | legal & business affairs | |
| Lauren Bissett | .... | production team | |
| Charlotte Bovey | .... | production team | |
| Claire Bradley | .... | production secretary | |
| Lyndsey Chandler | .... | production accountant | |
| Adam Curwen | .... | production team | |
| Luisa De Rienzo | .... | researcher | |
| Alice Dodge | .... | researcher | |
| Sarah Green | .... | production coordinator | |
| Dean Jones | .... | head of production | |
| Sarah-Jane King | .... | publicist (as Sarah Jane King) | |
| Sara Lee | .... | publicist | |
| Ali McCabe | .... | production team | |
| Jessica Morris | .... | production team | |
| Katrina Morrison | .... | researcher | |
| Hannah North | .... | production assistant | |
| Joseph Patterson | .... | production team | |
| Rob Pearson | .... | creative researcher (as Robert Pearson) | |
| Jonathon Ridgard | .... | creative researcher | |
| Jonathon Ridgard | .... | researcher | |
| Leah Rumbol | .... | production coordinator | |
| Gary Smith | .... | publicist | |
| Neil Strawson | .... | production team | |
| Marcus Gray | .... | runner (uncredited) | |
| Richard Todd | .... | daily runner (uncredited) | |
| Main series | Episode guide | Full cast and crew |
| Company credits | IMDb TV section | IMDb Music section |