Justin Bieber, will.i.am, Nick Jonas and Marc Anthony will join regular judges Simon Cowell, Britney Spears, Demi Lovato and LA Reid to help select the final lineup for this year's live shows.
However, the 24 acts that have made it through to the Judges' Houses stage of the show will not be revealed until the next episode of The X Factor on Wednesday, October 10.
The categories which each judge will mentor will not be confirmed until Wednesday's show, although it has been claimed that this year's contestants will be split into four age bands.
It has also been reported that Bieber will partner Reid at Judges' Houses.
Last year's guest judges were Rihanna, Enrique Iglesias and Pharrell Williams.
The X Factor USA airs on Fox in the US and ITV2 in the UK.