The couple, who married in Italy last month, are set to host a party at Danesfield House hotel in Marlow.
A huge white marquee has been erected near the house just six miles away from the Grade II listed building George and his lawyer wife have allegedly bought as their new home.And with Brad Pitt and wife Angelina Jolie said to be on the guest list there's been no expense spared with fresh flowers brought in to decorate each table.
Boxes of pink orchards have been opened and vases filled with white flowers are being prepared.
Each dining table includes a tree in the middle, giving the room a certain ethereal Midsummer Night's Dream feel.
With dimmed lighting set for the evening do, it's bound to be an event not to miss for George and Amal's British family and friends.
Hotel staff tell The Daily Telegraph all rooms are unavailable for the weekend and the Michelin-starred restaurant is fully booked on Saturday night.
A source said: "It is the worst kept secret in Marlow."
Clooney and his new wife recently purchased a lavish marital home in Oxfordshire.
