Former world heavyweight champion boxer Mike Tyson has discovered he is banned from entering the UK.
Tyson, 47, was due in London this week as part of a promotional tour for his new autobiography, Undisputed Truth, which included a photocall with journalists and a book signing.
Tyson even wrote on Twitter on Friday: "So, UK fans, who is brave enough to get in the ring and ask me a question?"
Tyson is banned from entering the UK
In 1992, Tyson was convicted for the rape of a teenage beauty queen, and served three years of a six-year sentence. He also has convictions for assault, cocaine possession and driving under the influence.
A spokesman for HarperCollins said: "There was a change in the UK immigration law in December 2012 of which we were unaware. For this reason Mike had to change location to Paris to salvage his press obligations for the UK."
Tyson is currently booked in for a British tour for his one-man Broadway show, directed by Spike Lee, which is booked for eight nights in March next year in London, Glasgow and Manchester.
Under the new immigration rules, any person who has been sentenced to more than four year in prison is barred from entering the country.
The explosive boxer was the youngest man ever to become heavyweight champion of the world after he beat Trevor Berbick in 1986 when he was just 20.
But throughout his career he also courted controversy. He bit opponent Evander Holyfield's ear, went bankrupt, lost his four-year-old daughter in a tragic domestic accident, and was jailed.
Tyson in London
A Home Office spokeswoman said: "We would not comment on the details of an individual case.
"We reserve the right to refuse entry to the UK to anyone who is convicted of serious criminal offences.
"In December 2012 we toughened up the rules on entering the UK, replacing the previous discretionary approach with a clearer, stronger framework including mandatory refusals based on the length of, and time since, sentence."