Kate Middleton usually looks so ladylike and composed [1] during her royal outings that she often seems older [2] than she really is. But it's time we settled this once and for all: how old is the Duchess of Cambridge [3]? Well, Kate was born on January 9, 1982 [4], which makes her 35 years old. In fact, she's actually five and a half months older than Prince William.
The way Kate's chosen to ring in her birthday [6] over the years is also an indication of what else was happening in her life at that time. For her 35th this year, Kate reportedly celebrated privately at her home [7] in Norfolk, Anmer Hall, with William and their two kids, Princess Charlotte [8] and Prince George.