| Graham Norton | ... | Himself - Presenter (also archive footage) | |
| rest of cast listed alphabetically: | |||
| Kevan Allen | ... | Choreographer | |
| John Barrowman | ... | Himself - Judge | |
| Craig Chalmers | ... | Himself - Potential Joseph | |
| Jason Donovan | ... | Himself (also archive footage) | |
| Connie Fisher | ... | Herself (also archive footage) | |
| Stephen Gately | ... | Himself | |
| David Grindrod | ... | Himself | |
| Ben James-Ellis | ... | Himself - Potential Joseph (as Ben Ellis) | |
| Bill Kenwright | ... | Himself - Judge (also archive footage) | |
| Andrew Lloyd Webber | ... | Himself - Chief Judge (also archive footage) (as Lord Andrew Lloyd Webber) | |
| Lee Mead | ... | Himself | |
| Donny Osmond | ... | Himself | |
| Tim Rice | ... | Himself (as Sir Tim Rice) | |
| Zoe Tyler | ... | Herself - Judge (as Zoë Tyler) | |
| Denise Van Outen | ... | Herself - Judge (also archive footage) | |
| Episode Crew |
Directed by | |||
| Ben Archard | |||
| Michelle Kirschner | |||
| Nikki Parsons | (studio) | ||
Produced by | |||
| Ben Archard | .... | producer | |
| Beatrice Ballard | .... | executive producer | |
| Ed Booth | .... | edit producer | |
| Michael Canning | .... | assistant producer | |
| Niall Carmichael | .... | edit producer | |
| Mel Clive | .... | assistant producer | |
| Kathryn Fish | .... | assistant producer (as Kat Fish) | |
| Michelle Kirschner | .... | producer | |
| Kate Maddigan | .... | series producer | |
| Laura Maguire | .... | assistant producer | |
| Rea Menzies | .... | assistant producer | |
| Hersha Patel | .... | assistant producer | |
| Nathalie Rebhuhn | .... | edit producer | |
| Martin Scott | .... | executive producer | |
| Eve Winstanley | .... | assistant producer | |
| Sarah Woolley | .... | senior edit producer | |
Makeup Department | |||
| Courtney Corvan | .... | key makeup artist: Donny Osmond (uncredited) | |
Production Management | |||
| Judith Bantock | .... | production manager | |
| Fiona De Oliveira | .... | production manager | |
Art Department | |||
| Chris Webster | .... | designer | |
Sound Department | |||
| Chris Graver | .... | dubbing mixer | |
| Thomas Hart-George | .... | sound (as Tom Hart-George) | |
| Jo Morris | .... | sound recordist | |
| Tony Revell | .... | sound | |
Camera and Electrical Department | |||
| Chris Miller | .... | camera supervisor | |
| Chris Yacoubian | .... | camera supervisor | |
Editorial Department | |||
| Nathan Carpenter | .... | off-line editor | |
| David Horwell | .... | on-line editor | |
| James Lessell | .... | off-line editor | |
| Tom McGough | .... | off-line editor | |
| Sam Ralli | .... | off-line editor | |
Music Department | |||
| Dan McGrath | .... | composer: title music | |
| Josh Phillips | .... | composer: title music | |
| Nigel Wright | .... | musical director | |
Other crew | |||
| Beatrice Ballard | .... | creative head | |
| Ben Blair | .... | researcher | |
| Anna Brickles | .... | researcher | |
| Claire Bridgland | .... | production executive | |
| Suzannah Butcher | .... | researcher | |
| Alice Dodge | .... | researcher | |
| Sarah Fay | .... | researcher | |
| Celia Frayne | .... | production coordinator | |
| Greg Hall | .... | runner | |
| Tim Hancock | .... | researcher | |
| Kate Jones | .... | production coordinator | |
| Stefan Klenke | .... | researcher | |
| Zak Kurtha | .... | runner | |
| Lauriel Martin | .... | production secretary | |
| Vicky McDonnell | .... | runner | |
| Alex Moss | .... | additional runner | |
| Alice Ounsted | .... | production secretary | |
| Ben Saxton | .... | researcher | |
| Karen Smith | .... | creative director | |
| James Taylor | .... | researcher | |
| Liz Trott | .... | event producer | |
| Sacha Whitmarsh | .... | production accountant | |
| Main series | Episode guide | Full cast and crew |
| Company credits | IMDb TV section | IMDb Music section |