Britain's Got Talent 2013: David Walliams is up to no good again!

Alesha Dixon (Britain's Got Talent 2013)

David Walliams has been causing more mischief on Britain's Got Talent 2013!

The comic has been winding up Simon Cowell since auditions began, leaving him on the 'naughty step'.

Fellow judge Alesha Dixon revealed: "David's constantly on the naughty step! You'll see!"

She added: "Amanda and I both keep the boys in line, as omehting they get a bit carried way I have to say 'Get back to the act - it's not about you too!'"

David's already been making may quips about Simon's expense, most recently poking fun at his love life.

Speaking before the try outs in London earlier in the month, Simon said he was "dreading" having invited David back onto the show!

He teased: “I’m actually dreading David. I woke up this morning thinking I’m not looking forward to this.”

But we're sure he doesn't mean it!

Meanwhile, Alesha told us at the start of auditions in London earlier this month she wasn't after a particular act to win this series.

She said: "I don't mind who wins as long as they have bundles of talent, and the pubic fall in love with them."

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