London: Physicist Stephen Hawking has signed up to make a cameo appearance in US sitcom 'The Big Bang Theory', reports contactmusic.com.
"When people would ask us who a 'dream guest star' for the show would be, we would always joke and say Stephen Hawking - knowing that it was a long shot of astronomical proportions.
"In fact, we're not exactly sure how we got him. It's the kind of mystery that could only be understood by, say, a Stephen Hawking," said show's producer Bill Prady.
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