The youngest sister confirmed yesterday (October 16) that she has been chosen to host the Simon Cowell talent show alongside Mario Lopez.
In a message on her official website, Khloe wrote: "I'm sure you've been hearing the rumours and I'm SO excited that I can finally confirm the news - I am joining The X Factor."
Kim later republished her sibling's post on her own Twitter profile, adding: "U will make such an amazing host!"
It has been reported that Khloe's X Factor deal was rescued by her mother Kris Jenner after talks almost collapsed.
"[Kris] stepped in over the agents... over everyone," a source claimed. "She just knows how to make s**t happen."
Khloe and Lopez will make their debut when the X Factor USA live shows begin on November 1.