Kate at 40: how the Duchess of Cambridge is coming into her own as she moves into a new decade

She was in her teens when she started dating one of the world’s most sought-after bachelors.

She married the future monarch when she was in her 20s and had three children, including a future king, when she was in her 30s. 

Now the Duchess of Cambridge has turned 40 and royal watchers are saying it’s the decade she’s going to really take on the royal mantle and show why she’s perfect to be a future queen.