Brad Pitt had so much fun snapping shots of common law wife Angelina Jolie and the bouncing brood of six for the November issue of W Magazine the actor is already working on a new photography project, a book on celebrity twins.

Star Magazine writes: “Having twins inspired Brad to do it. He’s constantly snapping pictures of Knox and Vivienne.”

The A-list actor has already begun enlisting the help of pals who may be interested in being photographed for the book.

Brad is particularly interested in documenting Marcia Cross’ twin girls, Eden and Savannah, and Marc Anthony and Jennifer Lopez twin tots, Max and Emme.

“Julia Roberts is willing to let him shoot Phinnaeus and Hazel. Brad’s calling everyone. If all goes well, the book will be out next year.”