Pop star Rita Ora and big mouthed BBC Radio 1 presenter Nick Grimshaw have signed up as judges for the 12th series of The X Factor, producers have confirmed.

Grimshaw, who hosts Radio 1’s breakfast show, replaces Louis Walsh, taking his seat beside show creator Simon Cowell and Cheryl Fernandez-Versini.

Pop star Rita Ora fills the fourth chair, jumping ship from BBC One’s The Voice after just one series.

The singer previously appeared as a guest judge on The X Factor in 2012.

“I am excited to be coming back,” said the star. “I had a ball here in 2012. This is a journey I can’t wait to embark on to find some talented singers.

“It’s the new generation taking over. Booooom.”

Grimshaw added: “I love X Factor and have watched the series religiously since it started, so obviously I’m hugely excited to be joining the show.

“Music is my job and my passion and I’m really looking forward to seeing what talent we can find and nurture this year. I can’t wait for judges’ houses in Oldham!”

Ora and Grimshaw are close friends, and producers will be hoping their chemistry adds a new dynamic to the venerable TV talent show.

Cowell said: “The best-kept secret in TV is out!! But I am really happy with the new judging line-up for X Factor this year. It’s going to be a lot of fun.”

He said he had “met a lot of people” when looking for new judges. “We have always had great judges. And I will always be thankful for their passion and expertise,” he said.

“I have no idea what the show will look like but I feel both excited and nervous. It’s going to be very different! Embrace the madness…”

Kiss FM presenters Rickie and Melvin (We’ve never heard of them either) are being tipped to host The Xtra Factor spin-off.

See pics of the presenters