On January 9, Kate Middleton celebrates a major birthday milestone: 40 years.

WhatMiddleton originally wanted for her lifewas something quiet in the country, centered around her family and raising children.

you could take your time and enjoy your family."

Kate Middleton in snow cap

But the two have more in common than just their husband’s actions.

Armed with thecelebrity statusher title gave her, Princess Diana brought high-profile awareness to many causes, including HIV/AIDS.

Today, many are saying the same thing about the Duchess of Cambridge.

Diana Spencer, Princess of Wales

That is like Diana was" (perThe Mirror).