The X Factor 2015: Leah goes behind the scenes at auditions

Video caption, Will The X Factor's new line up of judges and presenters be a hit with viewers?

The X Factor returns to our TV screens this Saturday with the hope of finding the world's next big music superstar.

The new series has two new presenters, Caroline Flack and Olly Murs, and two brand new judges.

Pop star Rita Ora and 成人快手 Radio 1 presenter Nick Grimshaw are both joining the judging panel for the first time.

Video caption, Leah sits down with The X Factor's new judges

The X Factor also announced that it will be handing power over to the viewers, to choose which categories the judges will mentor.

It will be the first time in the show's 12 years that a live vote is held during auditions.

Video caption, Meet some of this year's X Factor hopefuls

Leah went to the London auditions to find out if the new changes are enough to get more people watching.

She also met some of the acts hoping to stand out and impress the judges this year.

Image caption, Rita Ora is a new addition to the judging panel alongside Nick Grimshaw, Cheryl Fernandez-Versini and Simon Cowell
Image caption, The X Factor's new presenters Caroline Flack and Olly Murs had time for a quick selfie with Leah