George Clooney, wedding host

Emily Blunt married John Krasinksi in a ceremony hosted by George Clooney, it has been revealed.

The 27-year-old actress and 30-year-old actor wed earlier this month, but have been keen to keep the details of the nuptials private.

It was known the ceremony took place in Italy and that George - who appeared in 2008 movie Leatherheads with John - was present, but it has now been claimed the Hollywood star was instrumental in organising the wedding.

It reportedly took place in the grounds of George's villa on Lake Como, in a pagoda he had specially erected.

Guests stayed at the property for five days, and were treated to a number of special outings organised by Emily's father Oliver Blunt.

One trip saw the guests cruising around Lake Como together, which Emily's Devil Wears Prada co-star Meryl Streep particularly enjoyed.

"On board they were all playing ABBA songs and Meryl volunteered to sing along with Joanna, Emily's mother, and John's mum Marie Clare to the song Mamma Mia! She had her arms around them belting out the songs," a source told British newspaper The Daily Express.

Meryl learnt the words to the songs for her role in 2008 movie Mamma Mia! which featured a host of ABBA songs.

Oliver bonded well with George, who had arranged a no-fly zone over his home to avoid sneaky pictures being taken of proceedings.

"Oliver described George as a really nice bloke who mucked in humping boxes and speakers around and left the ceremony to organise the movement of tables inside in case the weather turned nasty," the source added.

John and his ushers wore black suits by Hugo Boss, while Emily donned an ivory Marchesa gown.