Last month, Mr Zuckerberg visited Moscow, where he made his first TV chat show appearance, as well as a highly publicised meeting with the Prime Minister, Dmitry Medvedev.

BBC: North America

She did not go to the police at the time, but did raise the allegation in a TV chat show in 2007, when Mr Strauss-Kahn's name was bleeped out.

BBC: Strauss-Kahn faces Tristane Banon rape allegation

Barack Obama went on a TV chat show on May 14th and responded to questions about the loss by implying it would have been blocked under the Volcker rule banning proprietary trading.

ECONOMIST: A scramble to benefit from a bad trade

He appeared on the Ellen DeGeneres chat show in the US in front of a TV audience of millions to talk frankly about his so-called "coming out" experience.

BBC: Gareth Thomas

On TV John has presented Rugby Special, Sunday Grandstand and the acclaimed sports chat show On Side.

BBC: John Inverdale

On TV John has presented Rugby Special, Sunday Grandstand and five series of the acclaimed sports chat show On Side.

BBC: John Inverdale

Chat show rivals Jonathan Ross and Graham Norton are to battle it out at the National TV Awards in January.

BBC: Graham Norton battles Jonathan Ross for TV award