Besides crowns and ermine-trimmed velvet robes, perhaps no piece of clothing is more associated with British royalty than the coatdress. The garment has become a staple in the closets of royal family members from Princess Anne to Princess Eugenie, but its primary champion is none other than Kate Middleton. Over the years, the Princess of Wales has put her stamp on the silhouette, often embarking on public engagements wearing a vibrantmidi-length coatdress, typically from London-based fashion designer Catherine Walker.