BRITAIN'S Got Talent fans reckon they know who the stomach-churning witch on Saturday's show is.
What's more, the person's name was mentioned on the show just moments before the act stormed on stage.
Many believe the creepy character is none other than former BGT spin-off host and noted magician Stephen Mulhern.
And as several fans pointed out he was mentioned - in not entirely complimentary terms - just moments before the witch came on stage.
He was the subject of a joke by singer Honey Scott who made a joke about him not being part of the show any more.
Stephen, as well as being a TV presenter, is also one of Britain's most skilled magicians and was the youngster person admitted to the Magic Circle.
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He even won Jonathan Ross' Big Big Talent Show as a magic act and appeared on the Royal Variety Performance in 1997.
Many Britain's Got Talent viewers were convinced he is the witch after the show on Saturday.
One wrote confidently: "SPOILER: Stephen Mulhern is the witch character on #BGT."
Another tweeted: "The Witch I am guessing is Stephen Mulhern."
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The act began with the witch appearing on stage, stomping down the steps and handing out apples to each of the judges in turn.
When it came to Amanda the witch held her wrist and one hand and a gnarled stick in the other.
They cackled: "Do you know why they say beauty's only skin deep? Because we're all rotten to the core."
A third hand then shot out of the witch's black cloak and grabbed the apple in Amanda's palm.
It then exploded into a collection of cockroaches and mealworms, which wriggled and crawled around the judges' desk.
While Amanda, Alesha Dixon and David Walliams all leapt up from the judging desk, Simon Cowell stayed in his seat looking dumbstruck.
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