The X Factor Uk - — Season 15

: The former One Direction member mentored the "Boys" and became the first former contestant to mentor a winner ( Dalton Harris ) . Robbie Williams : Mentored the "Groups" category .

: This was the final traditional series of the show before it transitioned into celebrity and "all-star" formats in 2019 and was eventually officially cancelled in 2021 . The X Factor UK - Season 15

: Secured third place, marking a successful return after withdrawing from the previous season. ⚖️ The Judging Panel The 15th series introduced a brand-new panel, including: Simon Cowell : Mentored the "Girls" category. : The former One Direction member mentored the

: Major themes included "This Is Me" during the Live Shows , where contestants performed songs that defined them as artists . The X Factor UK - Season 15