Louis Tomlinson has admitted he's nervous ahead of The X Factor's six chair challenge.
Louis is one of three new X Factor 2018 judges this year alongside husband and wife Robbie Williams and Ayda Williams.
They join Simon Cowell on the panel, who are currently filming the six chair challenge stage in London.
Ahead of the next stage, the X Factor judges' categories have been confirmed with each judge taking charge of one group of acts.
Speaking backstage at Wembley, Louis - who has the Boys - said after the first day of filming: "It was as brutal if not more brutal than as you see on TV."
He added: "I'm nervous about my category tomorrow and excited. I hope everyone delivers."
Robbie, mentoring the Groups, said: "So we've just done six chairs for the first time and everyone thing previous to that has been a walk in the park.
"I honestly didn't know what we were letting ourselves in for. The motions you feel the vibe from the audience, the ups and downs are incredible.
"I'm really not looking forward to doing mine because there were some tough choices sending people back to where they come from or they stay on their journey to follow their dream."
Meanwhile, Ayda is taking control of the Overs while Simon is looking after the Girls.
In the Six Chair Challenge, all the successful acts in each category will sing one after the other for both the judges and a live audience.
All the panel will comment but it'll only be the mentor of that category that picks who goes through to judges' houses.
Those who make it will take a seat on one of six chairs but they're place in the next round is far from safe.
As more acts sing, the mentors can choose to swap those in a seat out for another act if they feel others performed better.
Those that are left sitting at the end will go forward to judges' houses
From judges' houses, acts will compete to make the live shows, where Sharon Osbourne will join the panel.
The X Factor 2018 will start on ITV later this year.