Sharon Osbourne has asked her daughter Kelly and son Jack to join her for the Judges' Houses round of this year's 'The X Factor'.

Sharon Osbourne

Sharon Osbourne

The 64-year-old judge enlisted the help of Robbie Williams last year but has decided to keep it a family affair this time as she's asked her grown-up kids to help her choose which three acts from her Girls category she should take through to the live shows.

A source told The Sun newspaper: "Last year Sharon had Robbie Williams as her guest judge, but she wanted to do something different this time. She's invited Jack and Kelly but there's no space for [he husband] Ozzy [Osbourne]."

But the trio will be under a lot of pressure to make the right decision as the chosen acts will go up against Nicole Scherzinger's Overs, who she chose with the help of grime star Stormzy, Simon Cowell's three Groups, who were selected by his guest judge Cheryl Tweedy, and Louis Walsh's Boys, who he whittled down to just three with the help of a mystery guest.

Although the live shows haven't kicked off yet, Nicole - who previously guided James Arthur and Matt Terry to victory - is sceptical about her chances of triumphing again with one of her hopefuls.

Speaking previously, the 'Don't Hold Your Breath' hitmaker said: "I'm always very competitive. I put a million per cent into everything I do, but two years in a row? I don't know about that."

And the artist is already backing someone from one of the other groups to win this year's series.

She explained: "It's interesting because I have a feeling about somebody who is going to win - but they're not in my category.

"I'm upset because [the producers] were going to give me a category and I said, 'No, I want this one instead'. I got what I wanted but I really should have had what they were going to give me."