Britain's Got Talent judges Simon Cowell and David Walliams had a bust up on the set of the Jonathan Ross show this week, as David spoke out about Simon's sexuality.
The pair were interviewed on the ITV1 chat show, to air this Saturday, and David reportedly left Simon "fuming" after a string of "person insults and gay jibes".
Speaking of joining the Britain's Got Talent panel earlier this year, David revealed: “The main question I get is, ‘Is Simon gay?’ Even my mum asks. She says, ‘He’s nice. Is he gay?’”
Simon tried to turn the conversation back to the show, Simon explained how he woke up at noon and worked through to 5am the next day.
But David was quick to quip: “At 12 o’clock at night you’re working quite hard – because that’s when the ladyboys come round.”
To which Simon snapped: “It’s worth pointing out that I have a relationship with ITV and most of this will be edited out.”
David also made jokes about Simon's ex Sinitta, his moobs and even his haircut, likening it to a Legoman’s.
But a source insisted that Simon took the jibes in good fun, saying: “He knows the sense of humour David and Wossy have.”
Writing on Twitter last night, Simon joked that he was already planning his revenge.
He wrote: "Did Jonathan Ross show last night with @davidwalliams - he's out of control. Just wait till BGT starts David, I'll get my own back!"
The interview, which also featured Labrinth, Dara O'Briain and Danny Devito, will be aired on Saturday night after Britain's Got Talent returns to ITV1.