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There's no denying that Kate Middleton and Princess Diana have shaped and influenced millions when it comes to their taste in fashion and unforgettable sartorial moments.

In fact, the Duchess of Cambridge and her late mother-in-law have both had their fair share of major style moments that they've even twinned on a few occasions. For example, Princess Diana and Kate Middleton have both been fans of long, sleek monochromatic gowns and favored colorful coats on royal outings. 

Even though the Princess of Wales' sartorial moments were in the late '80s and early '90s, her looks have remained timeless — which is why the Duchess of Cambridge looks so effortless each time she wears a look similar to her mother-in-law. Click through to see for yourself.