Catherine, Duchess of Cambridge
(or Kate Middleton to you and me), celebrates her 31st birthday today, and what a year she's had!

The wife of Prince William traveled the world in honor of Queen Elizabeth's Diamond Jubilee, cheered on Great Britain as an Ambassador of the Summer Olympic Games, and learned she's expecting the couple's first child!

E! News reports that the Duchess is celebrating privately -- we weren't really expecting a rager given her condition -- and in honor of the day, we've pulled together shots of Kate through the years.

Click "Launch Gallery" above to see photos of the gorgeous royal, from her days as a baby through her own baby announcement! Who knows, maybe her baby pics will even give us a hint of what the future King or Queen of England may look like...

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