Brad Pitt and fiance Angelina Jolie are preparing to throw a "Midsummer Night party".

The pair are temporarily residing in Richmond, London with their six children.

In honour of their adopted country, Brad and Angelina will be hosting a British-themed bash in Surrey this weekend.

"Brad and Ange hold a Midsummer party every year and always base the theme around a specific country because it's a great learning opportunity for the kids," a source told UK newspaper The Sun.

"They've done Australia, Russia and Germany in the past but as they're living in London they've really got into the spirit of things with the Jubilee and the Queen's birthday. It'll be like a British fete, with all the traditional games and cream teas in the garden in the afternoon."

The couple are said to have invited good friends George Clooney and his girlfriend Stacy Keibler to the affair.

Angelina is currently filming Disney's Maleficent at Pinewood Studios in Greater London.