The ginger fire-cracker has been invited to a fancy dress party at the Kremlin but hasn't got a clue what to wear.
Eventually he decides to 'fly the flag for Britain' and turns up wearing only a pair of David Beckham Y-Fronts.
He makes his grand entrance at the Moscow palace and sees gorgeous flame-haired former KGB spookette Anna Chapman dressed as Catwoman; she catches his eye and winks conspiratorily at him before suddenly lunging forward and grabbing his, er, arm.
'Harry, Harry, so sweet to meet you,' the Russian woman cooes in the Prince's ear, 'but tell me, what's happened to your fancy dress costume?'
'Er, this is it,' Harry replies.
'So you've come as ...?'
'Oh, I'm Premature Ejaculation, he he,' Harry answers.
'I've just come in my underpants tonight.'