Angelina Jolie & Brad Pitt Show Off Vivienne & Knox

Photos of Knox Leon and Vivienne Marcheline, the twins of Angelina Jolie and Brad Pitt, have been finally been published in the most expensive baby picture deal to have ever taken place.

The Hollywood power-couple welcomed son Knox and daughter Vivienne in France last month and subsequently sold the rights to the first pictures to America's People magazine for an estimated $11 million (£5.5 million).

The latest issue of Hello! magazine

In the new photo spread, which also appears in the U.K's Hello! magazine, Pitt and Jolie are seen embracing the new additions to their family, while their two-year-old biological daughter Shiloh is pictured holding her baby sister.

The pair already has three adopted children Maddox, six, Pax, four, Zahara, three, and biological child Shiloh - and the twins extend their brood to six.

And Jolie insists that having such a large family is proving to be quite a struggle. She says: "It is chaos, but we are managing it and having a wonderful time."

However, Jolie admits that she is getting some help with the babies - from her two elder daughters.

She adds: "(Shiloh) and Z (Zahara) pick out (the twins') clothes and help change and hold them. It's sweet - they are little mommies."

Click to check out The Most Expensive First Baby Pictures of all time