The Us boyband - who have celebrated their 20th anniversary this year - will take to the stage for an exclusive performance on the ITV2 spinoff show.
The performance was confirmed by The X Factor's official Twitter account following tonight's live show.
The 'I Want It That Way' group released their eighth studio album In a World Like This earlier this year, which peaked at number-16 on the UK Albums chart.
They performed an intimate gig at London's Under the Bridge in June, and took part in a Q&A with UK fans.
Gary Barlow and Miley Cyrus will perform on The X Factor results show tomorrow night at 8pm on ITV1. The Xtra Factor follows at 9pm on ITV2.
Watch the music video for 'In a World Like This' below:
Photo Gallery: 'X Factor'