| Judges |
| Simon Cowell |
(Series 1–) |
| Dannii Minogue |
(Series 4–) |
| Louis Walsh |
(Series 1–) |
| Cheryl Cole |
(Series 5–) |
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| Presenters |
| Dermot O'Leary |
(ITV1, series 4–) |
| Holly Willoughby |
(ITV2, series 5–) |
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| Voice-overs |
| Peter Dickson |
(2004–present) |
| Enn Reitel |
(2004–present) |
| Previous series |
| Series 4 (2007) finalists |
|
Winner: Leon Jackson
Runner-up: Rhydian Roberts
Others: Same Difference, Niki Evans, Hope, Beverley Trotman, Alisha Bennett, Andy Williams, Futureproof, Emily Nakanda (withdrew), Daniel DeBourg, Kimberley Southwick
|
| Series 3 (2006) finalists |
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Winner: Leona Lewis
Runner-up: Raymond Quinn
Others: Ben Mills, The MacDonald Brothers, Eton Road, Robert Allen, Nikitta Angus, Ashley McKenzie, Kerry McGregor, Dionne Mitchell, 4Sure, The Unconventionals.
|
| The X Factor: Battle of the Stars contestants |
|
Winner: Lucy Benjamin
Runner-up: Matt Stevens
Others: Chris Moyles, The Chefs (Jean-Christophe Novelli, Aldo Zilli, Paul Rankin and Ross Burden), Nikki Sanderson, James Hewitt and Rebecca Loos, Michelle Marsh, Gillian McKeith, Paul Daniels and Debbie McGee.
|
| Series 2 (2005) finalists |
|
Winner: Shayne Ward
Runner-up: Andy Abraham
Others: Journey South, Brenda Edwards, Chico Slimani, The Conway Sisters, Nicholas Dorsett, Maria Lawson, Chenai Zinyuku, Phillip Magee, 4Tune, Addictiv Ladies.
|
| Series 1 (2004) finalists |
|
Winner: Steve Brookstein
Runner-up: G4
Others: Tabby Callaghan, Rowetta Satchell, Cassie Compton, Voices With Soul, 2 To Go, Verity Keays, Roberta Howett.
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