Kate Middleton
Credit: Fame Pictures; Bauer Griffin (2)

Even Duchesses repeat outfits! Catherine Middleton wore her favorite purple cashmere Ralph Lauren sweater ($400 at three times this month—twice while grocery shopping and once while taking a walk with Prince William. And that outfit isn’t Middleton’s only go-to! Click “See the Photos” to browse Duchess Catherine’s most famous double (and triple) takes!MORE:Duchess Catherine’s California OutfitsDuchess Catherine’s Skin Secrets