Brad Pitt and Angelina Jolie plan A-list Olympic party with Prince William on the guest list
The black tie do - raising funds in aid of the Sports For Peace initiative - is to be held at the Victoria & Albert Museum and will feature a champagne reception and 4-course dinner.
'Forget the official opening ceremony, this is the party to be at,' says a source.
'It's going to be an Olympics-themed party, with huge buckets of homemade cocktails on offer.'
'The who's who of British and American celebrity will be in attendance,' the source tells the Daily Mirror.
'Invitees have been ordered not to take any photos from their phones.
Brad, 48, and his fiancée have temporarily set up home in the UK while Angelina, 37, films her new movie Maleficient.