The newspaper claims that Cowell is planning an Olympic-themes extravaganza when the live rounds of the programme begin.
Mo Farah won two gold medals in the Olympic Games in the 5,000m and 10,000m events and has made a number of television appearances recently.
Mel B shocked X Factor audiences and hopefuls with her forthright opinions as she appeared in the first in the new series as a guest judge.
The new series of The X Factor is back tonight with an episode that judge Louis Walsh has named "the best first show ever".
X Factor judge Louis Walsh has said that the start of the new series of the talent show on Saturday night is 'the best first show ever'