Comedian David Walliams has said that he has a secret ambition to be a judge on The X Factor – but only if he can sit next to Simon Cowell.

The funnyman – whose presents the new Sky One show Wall Of Fame – confessed that he would love to take the seat vacated by Cheryl Cole, if Cowell returned to the judging panel of the series.

“I’d take part in The X Factor if I could have the seat next to Simon,” David said. “That would be my condition. I’d like to be in the Cheryl Cole seat. He usually has the person he fancies sitting next to him.”

However he admitted he might struggle when it came to actually judging the auditionees on a reality show.

“I actually don’t know if I could judge people’s talent,” David said. “I don’t know if I’ve got enough talent myself, I still think I’d find it hard to say no to people.

“Simon didn’t ever need to be liked whereas a performer generally wants the approval of the public, especially if you’re a comedian. So if you have to say no and start getting booed by audiences, it can be tricky. But I don’t know, maybe one day I’ll do one.”