Writing in ‘Stephen Hawking: An Unfettered Mind’, author Kitty Ferguson revealed the cosmologist crushed the toes of the first-in-line to the throne in 1977 as the Duke of Cornwall was being inducted into the Royal Society.
She wrote: "The prince was intrigued by Hawking’s wheelchair, and Hawking, twirling it around to demonstrate its capabilities, carelessly ran over Prince Charles’s toes… People who annoyed him, it was said, found themselves a target."
It was also rumoured Professor Hawking, who was known for his outspoken political views, had also hoped to run over the toes of then-Prime Minister Margaret Thatcher.
He dismissed the claims in the 2012 biography as a “malicious rumour”, before joking “I’ll run over anyone who repeats it”.