Here's a rundown of all the contestants left on The X Factor 2018.
Three episodes of the Six Chair Challenge saw the mentors take control of their categories, selecting just six acts each.
It's now onto the judges' houses stage where the acts will be cut down once again. Each mentor will have to pick just four acts to make it through to the live shows.
In tonight's first episode, Simon Cowell will take the girls to Malibu with some 50 guests from the music business including Randy Jackson, Paula Abdul, Diane Warren and Ryan Seacrest. There's also former X Factor winner Leona Lewis and judges' houses regular Sinitta .
Singing in the Girls category are Bella Penfold from Essex, Georgia Burgess from Birmingham, Maria Laroco, from Philippines, Molly Scott, from County Durham, Scarlett Lee, from Surrey and Shan, from Croydon.
Next weekend, Robbie Williams will fly the Groups to Beverley Hills with guest judge David Walliams.
The final six acts in his category are A* made up of Acacia, and Aaliyah,, LMA Choir from Liverpool, Misunderstood made up of Stefan and Jeff both from London, Panda and Burgundy, from USA, girl group Sweet Sense made up of Billie, Ellie, Kezia, Gaia and Charlie and boy band Vibe 5 made up of Kieran, Jack, Jon, Blaise and Elliot.
Louis Tomlinson will take the Boys category to Ibiza with fellow One Direction star Liam Payne plus Nile Rodgers.
Contestants in the Boys category are Anthony Russell, 28, from Liverpool, Armstrong Martins, 23 from London, Brendan Murray, 21 from Galway, Dalton Andre Harris, 24 from Jamaica, J-Sol, 25 from London and Thomas Pound, 20 from Bridgend.
Finally, Ayda Williams will be joined by guests Leona Lewis and Adam Lambert in LA with the Overs. Her final six acts are are Danny Tetley, 37 from Bradford, Giovanni Spano, from London, Janice Robinson, from USA, Louise Setara, from Surrey, Olatunji Yearwood, from Trinidad and Tobago and Ricky John, from London.
The X Factor Judges Houses air from Sunday 7th October, 8pm on ITV