Series Start Finish Winner Category Winning mentor Presenter(s) UK sponsor Judges Episodes
(inc. results shows)
Average
UK viewers
per episode
(millions)
1 4 September 2004 11 December 2004 Steve Brookstein Over 25s Simon Cowell Kate Thornton Nokia[1] Simon Cowell
Sharon Osbourne
Louis Walsh
24 7.40
2 20 August 2005 17 December 2005 Shayne Ward Under 25s Louis Walsh 30 8.73
3 19 August 2006 16 December 2006 Leona Lewis Simon Cowell Simon Cowell
Sharon Osbourne
Louis Walsh
Paula Abdul1
30 8.27
4 18 August 2007 15 December 2007 Leon Jackson Boys Dannii Minogue Dermot O'Leary The Carphone Warehouse[1] Simon Cowell
Sharon Osbourne
Louis Walsh2
Dannii Minogue
Brian Friedman2
28 8.57
5 16 August 2008 13 December 2008 Alexandra Burke Girls Cheryl Cole Simon Cowell
Louis Walsh
Dannii Minogue
Cheryl Cole
30 10.51
6 22 August 2009 13 December 2009 Joe McElderry Boys TalkTalk[2] 30 13.0
7 21 August 2010 12 December 2010 Matt Cardle Dannii Minogue Simon Cowell
Louis Walsh
Dannii Minogue
Cheryl Cole
Geri Halliwell3
Natalie Imbruglia3
Katy Perry3
Pixie Lott3
Nicole Scherzinger3
30 14.13
8 20 August 2011 11 December 2011 Little Mix Groups Tulisa Contostavlos Louis Walsh
Tulisa Contostavlos
Gary Barlow
Kelly Rowland
Alexandra Burke4
31 12.41
9 18 August 2012 9 December 2012 James Arthur Boys Nicole Scherzinger Louis Walsh
Tulisa Contostavlos
Gary Barlow
Nicole Scherzinger5
Geri Halliwell5
Leona Lewis5
Rita Ora5
Mel B5
Anastacia5
31 9.63
10 31 August 2013 15 December 2013 Sam Bailey Over 25s Sharon Osbourne Dermot O'Leary
Caroline Flack6
Sharon Osbourne
Louis Walsh
Gary Barlow
Nicole Scherzinger
32 9.45
11 30 August 2014 14 December 2014 Ben Haenow Simon Cowell Dermot O'Leary Simon Cowell
Louis Walsh
Cheryl Fernandez-Versini
Mel B
Tulisa Contostavlos7
34 8.65
12 29 August 2015 13 December 2015 Louise Johnson Girls Rita Ora Caroline Flack
Olly Murs
Simon Cowell
Cheryl Fernandez-Versini
Nick Grimshaw
Rita Ora
28 6.85
13 TBA TBA TBA TBA TBA Dermot O'Leary TBA TBA TBA TBA
Notes
  1. ^ Paula Abdul served as a guest judge for the London auditions.
  2. ^ Brian Friedman served as a guest judge for the London auditions following the departure of Louis Walsh, but was later reassigned the role of creative director and Walsh was reinstated. He was originally recruited to be a permanent judge.
  3. ^ a b c d e During the auditions and bootcamp, several guest judges served as temporary replacement for Dannii Minogue, who was not able to attend due to being pregnant. Geri Halliwell served as guest judge at the Glasgow auditions; Natalie Imbruglia at the Birmingham auditions; Katy Perry at the Dublin auditions; Pixie Lott at the Cardiff auditions; and Nicole Scherzinger at the Manchester auditions and bootcamp.
  4. ^ During week 4 of the live shows, Kelly Rowland was unable to travel back from Los Angeles as she had a throat infection. Alexandra Burke temporarily replaced her.
  5. ^ a b c d e f After Kelly Rowland's departure, Geri Halliwell (Liverpool), Leona Lewis (London), Rita Ora (London), Nicole Scherzinger (London), Mel B (Manchester) and Anastacia (Glasgow) all filled in as guest judges during the auditions until Scherzinger joined the judging panel as the fourth permanent judge for the final auditions in Newcastle and Cardiff.
  6. ^ Caroline Flack served as a backstage presenter during the live shows.
  7. ^ Tulisa Contostavlos served as a guest judge for the first night of week 10 of the live shows in place of Mel B who was ill.
  1. ^ a b Sweney, Mark (19 June 2007). "Carphone Warehouse gets The X Factor". The Guardian.
  2. ^ "Talk Talk in £20m X Factor sponsorship". Media Week. 12 May 2010.