Simon Cowell and David Walliams went head to head in a dog off backstage on Britain's Got Talent.
According to More Talent host Stephen Mulhern, the pair of judges spent much of the auditions bickering over which of them had the best pets.
“Simon and David will sit and argue about who has the most entertaining dog. All the judges have dogs, I suggested we have a ‘dog off’," Stephen revealed today.
He explained: “Simon will accuse David’s dog of being boring. You sit back and think this is weird, this is the most powerful man in entertainment."
And it sounds like a dog-off wasn't the only mischief that the judges got up to behind the scenes at this year's auditions.
Stephen went on: “Another time Simon gave David some of his mouthwash. We were in the judges’ room. Instantly you can see in David’s eyes it’s burning him...and then Simon is chasing David and they’re running round the table, it’s like a sitcom."
Meanwhile speaking to the Daily Mirror newspaper, Stephen admitted he was "fascinated" about Simon's new son and family.
"David Walliams will certainly tease him," he told the tabloid. “I’m fascinated, it’s fascinating, and I can’t wait to see him.”
Britain's Got Talent starts next month on ITV.