George and Amal Clooney have returned to Italy to celebrate her birthday with a three-day, star-studded party, it has been reported.
The actor and his human rights lawyer wife are understood to have invited friends to their mansion on Lake Como.
The party is a belated celebration of Mrs Clooney's 37th birthday in February, according to a source.
Among celebrities expected to attend the exclusive event are Mr Clooney's Oceans 11 co-stars Matt Damon and Brad Pitt.
The couple, who also have homes in Los Angeles and Berkshire, married in Venice in September.
A source told The Times that strict security measures were in place around Villa Oleandra, the couple's lakeside home, ahead of the event.
It comes after local Italian authorities imposed harsh rules to allow the stars more privacy.
Earlier this month the mayor of Laglio - the exclusive community in which the house is set - increased fines to 500 euros for anyone caught loitering around the property.
Denying claims he had introduced 'a Clooney fine', Mayor Roberto Pozzi said the rules were designed to avoid 'dangerous situations' and ensure 'the circulation of boats in the lake'.
Last summer a similar 'no go' order was issued to prevent paparazzi boats from lingering in the vicinity.
Mr Clooney, 53, bought Villa Oleandra in 2002 for a reported 7.3million euros. He bought the adjacent Villa Margherita shortly afterwards.
Alongside their Italian pile the couple own a sprawling Berkshire manor house. They bought The Mill House in Sonning in 2013 for a reported £10.5million.
Mrs Clooney, who works for the London-based law practice Doughty Street Chambers, has recently taken on a lecturer post at New York's Columbia University.
Her actor husband has been seen filming scenes on the streets of New York for his forthcoming film, Money Monster.
In the film Mr Clooney plays Lee Gates, a financial TV personality whose insider tips have afforded him a reputation as the money guru of Wall Street.
