But who are the band members? Here's everything we know…
Who are the members of United Vibe?
The boys auditioned as individual singers and were put together before the Six Chair Challenge round, initially they were called Vibe Five before changing to United Vibe for the live shows:
Jon Guelas
Jon is an 18-year-old from Cambridge.
The singer impressed judges at his first audition with his guitar rendition of Seven Years by Lukas Graham.
He got four yeses, with Robbie Williams describing him as "obviously incredibly talented."
Louis Tomlinson added: "You have a really interesting tone, but you do need direction, and that's where we can help."
Jack Tisdale
The 16-year-old's first audition never made it to air, but he obviously caught the attention of the judges, as he was put into Vibe 5.
You can follow if on Instagram at @jack.tisdall.
Blaise Duncan
Not only did the 16-year-old receive four yeses with his cover of Bailando by Enrique Iglesias, but his first audition performance was also posted by Iglesias himself on Instagram.
Elliot Horne
18-year-old Elliot was well-received by the crowd in his first audition before he had even started singing.
It was no surprise he got four yeses after performing Lost in Japan by Shawn Mendes.
Kieran Harrison
Like Jack, 21-year-old Kieran's audition didn't make it to air.
But before the Six Chair Challenge he posted several pics from LA, leading fans to speculate the group had got through to the live finals.
Who are The X Factor 2018 judges?
The X Factor 2018 judges are Simon Cowell, Louis Tomlinson, Robbie Williams and his wife Ayda Field.
Sharon Osbourne will step in to cover for Robbie during the live shows while he's on tour in South America.
X Factor continues every Saturday and Sunday.
When is The X Factor 2018 on?
New episodes of The X Factor air every Saturday and Sunday on ITV.
It usually starts around 8pm although the time can vary from week to week.
Last year's contest was won by Rak-Su who triumphed in the final over Grace Davies.
Following the first auditions, the Six Chair Challenge and the Judges' Houses, the live shows will kick off on Saturday, October 20.
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