The X Factor UK - Season 15 (2018)

The search for a new music superstar continues with the fourth round of the Auditions shows.

The SSE Arena Wembley is the location as the audition rounds continue in the talent contest, hosted by Dermot O'Leary. Judges Robbie Williams, Ayda Williams, Louis Tomlinson and Simon Cowell decide who goes through to the Six Chair Challenge, before the competition really heats up later in the year with the live shows.

The search for a new music superstar heats up as the auditions continue at the SSE Arena.

The search for a new music superstar heats up as the auditions continue. Joining music mogul Simon Cowell as judges are Robbie Williams, Ayda Williams and Louis Tomlinson.

The search for a new music superstar heats up as the auditions continue.

As the Six Chair Challenge returns, judges Simon Cowell, Louis Tomlinson, Robbie Williams and Ayda Williams must decide on the final six acts in each category to take through to Judges' Houses.

In the second of three special Six Chair Challenge episodes, the stakes are high as the acts perform individually for a place at the Judges' House.

Dermot O'Leary hosts the third and final Six Chair Challenge episode, in which the acts perform individually before the judges choose who will be selected for the next stage.

The live shows draw closer for the remaining 24 acts as they jet off to the Judges' Houses stage, in a bid to land a coveted place in the live shows. Offering a glimpse into the jet-set lifestyle that the winner could have, the contestants travel to glamorous destinations across the world, and with just one more chance to impress their mentor, each act will be hoping to convince them that they have the star quality required to reach the live shows.

The live shows draw tantalizingly closer for the remaining 24 X Factor acts as they jet off to Judges' Houses in a bid to land a coveted place in the live shows.

The live shows draw tantalizingly closer for the remaining 24 X Factor acts, as they jet off to Judges' Houses in a bid to land a coveted place in the live shows.

Each of the final 16 contestants will sing their hearts out live on stage with judges Simon Cowell, Louis Tomlinson, Robbie Williams and Ayda Williams taking their seats behind the judges' desk to battle it out with their contestants in the hope of impressing the audience at home.

After the first live show performances, who has impressed enough to remain in the competition, and which act has reached the end of their journey?

The X Factor live shows continue with each of the remaining contestants taking to the stage in the hope of impressing the audience at home.

The X Factor live shows continue with the Sunday night results show where an outstanding line-up of guest stars perform.

Dermot O'Leary hosts the third week of the singing contest's live shows, with the remaining acts keen to impress the judges as well as the viewers who will be casting votes for their favorite - with tomorrow night's results show revealing which acts have proved a hit and who will be leaving the contest this week.

The X Factor live shows continue with the Sunday night results show in which an outstanding line-up of guest stars perform.

Dermot O'Leary hosts the fourth week of live shows. The remaining 14 acts will be keen to impress judges Simon Cowell, Louis Tomlinson, Ayda Williams and Nile Rodgers - still filling in for the absent Robbie Williams - as well as the viewing public - and escape elimination in tomorrow night's results show.

Dermot O'Leary introduces the results from the fourth week of the live shows, and reveals which acts have made the best impression on both judges Simon Cowell, Louis Tomlinson, Nile Rodgers and Ayda Williams, and the viewing public. Plus, a musical performance from a special guest star.

Dermot O'Leary hosts the fifth week of live shows, on the Big Band theme. The remaining acts will be keen to impress judges Simon Cowell, Louis Tomlinson and Ayda Williams - as well as the viewing public - and escape elimination in tomorrow night's results show, after Giovanni Spano departed last week. Ayda's husband and Groups mentor Robbie Williams is due to return to the judging panel next week, having missed several recent shows due to touring commitments in South America, so tonight will see a guest stepping into the former Take That star's shoes once again.

Dermot O'Leary introduces the results from the fifth week of the live shows, and reveals which acts have made the best impression on the viewing public as wells as Simon Cowell, Louis Tomlinson, Ayda Williams, and this week's special guest judge. Plus, a musical performance from a special guest star.

The X Factor live shows continue with each of the remaining contestants taking to the stage in the hope of impressing the audience at home and the panel of judges.

The remaining contestants discover who has done enough to earn their place in the final, and who faces the heartbreak of being sent home at the final hurdle.

It's The X Factor Final, and the remaining contestants take to the stage in the hope of impressing the audience at home and the panel of judges one last time.

The final results show features a chart-topping act performing, before the winner of this year's competition is announced.