Brad Pitt & Angelina Jolie's Twins, Knox & Vivienne, Turn 4!
July 12 2012, Published 9:30 a.m. ET
Angelina Jolie and Brad Pitt's twins Knox and Vivienne turn 4 years old Thursday, and we've got a special photo gallery of the lil'uns through the years.
Personality-wise, Angelina dropped details to Marie Claire about the pair, saying Vivienne is a "girlie girl" into getting "her nails done and stuffed animals," while Knox "is very much a dude … he loves dinosaurs and swords."
Of course, the twins' famous parents, who met filming Mr. & Mrs. Smith, are engaged, and the twins will be likely joined by siblings Pax, Shiloh, Maddox and Zahara when they exchange "I do's."
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