Beatles legend Sir Paul McCartney is in talks to perform on the final live show of this year's X Factor.
"It's something we are talking about. Dermot (O'Leary) is a lovely man who I know very well. He's full of energy and keen for me to do it.
"We're seeing if we can make it work. I've been watching on and off with my family."
The 67-year-old, who is currently in London to promote a CD and DVD of his summer concert, has also revealed his favourite contestants this year were John and Edward.
"It's impossible not to like them," Sir Paul says.
"They're a great couple of lads. But let's be honest, they were never going to last much longer in the show. They had to go."
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