BRITAIN'S Got Talent fans are convinced the horrifying Witch act is a very well-known actor. One popular theory is that Sherlock star Mark Gatiss, 55, is the man behind the creepy mask.
One viewer wrote on Twitter: "Looks like Mark Gatiss in prosthetics to me [laughing emoji]." Another said: "I was convinced that ‘The Witch’ on BGT was you Mark." A third said: "That witch was actually (actually) terrifying & a bit Mark Gatiss-like." Mark is a master of disguise having adopted many different characters in his career from the League of Gentleman and Game of Thrones. .css-16e4f55{margin:16px 0;}.css-1czxmma{background-color:rgba(252,239,255,1);margin:16px 0;}.css-1tapza8{padding:20px 15px;}.css-1bk4jdt{padding:20px.
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