Dawn French will watch her swearing on 'Superstar'.
The 'Vicar of Dibley' comic - who has signed up to judge ITV1's hunt for a musical theatre star alongside Lord Andrew Lloyd-Webber and Jason Donovan - is worried her famously potty mouth will get her in trouble during the live shows.
Dawn told the Daily Star newspaper: "I'm a notoriously rampant swearer and enjoy expletives enormously.
"I'm trying to use up all my foul language now so that I am severely depleted when it comes to the live telly."
'Superstar' sees musical theatre legend Andrew Lloyd-Webber searching for a talented performer to play the lead role of Jesus in 'Jesus Christ Superstar'. The winner will join Melanie Chisholm and Chris Moyles on a huge tour of the UK.
The 54-year-old joker - who split from husband Lenny Henry after 25 years in 2010 - has also shared her top tips for the auditionees.
She said: "Wear your lucky clean pants, breathe deep, slow and steady, try not to fall over, face the front, don't be cocky, don't wink, and don't attempt to show off skills you don't have."
Dawn is delighted with her new judging role, joking when the news was announced in May: "I'm gagging to find Jesus with the help of the Good Lord. I have actually been searching for him my whole life, and I can't believe that inside a few weeks we are going to find him.
"The fact that he is going to be a rock god is a massive bonus."
'Superstar' premieres this Saturday (07.06.12) on ITV1.