The couple have told friends they are leaving most decisions for their wedding to their six kids -- Maddox, 10, Pax, 8, Zahara, 7, Shiloh, 5, and twins Knox and Vivienne, 3.
"The fact is that Brad and Angelina are basically getting married for the kids, so they want them to be as involved as they possibly can be," showbizspy.com quoted a source as saying.
"The kids are super excited about the wedding and are coming up with all sorts of ideas about where and when the big day should be. They've even been drawing dress designs and cakes and Angelina is actually taking some of the less whacky ones seriously," the source added.
The couple confirmed their engagement April 14.
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