The singer revealed that she hasn't been approached to join the show, but would "absolutely do it" if she was asked by Simon Cowell.
Watch Estelle talk about The X Factor below:
She said: "If Simon calls I will let you know!
"Hell yeah I would do it - absolutely. I've been on X Factor a couple of times - it's hilarious to watch. Just to hear Louis [Walsh] shade people, it's amazing. It's one of the better shows on TV."
On how it compares with upcoming reality show The Voice UK, she admitted: "The Voice in the US is a pretty good show. They're not all completely brand new people - just great singers. I think it's a more credible approach to finding a star."
Former judge Dannii Minogue recently revealed that she would re-join the show if she was asked by Cowell.
Estelle's new album All Of Me is out now. Watch her full interview with Digital Spy below: