Lopping off a decent chunk of her lengthy chestnut curls is a big move for Kate, who's hair length has little changed since she stepped into the spotlight.
We take a look back at the Duchess's hair story:
2011: Kate opts for thin tendrils and a subtle off centre parting.
Catherine, Duchess of Cambridge at The Foundation Polo Challenge in California on July 9, 2011. Photo / Getty Images
2012: This year she goes for softer, fuller curls and a little more volume.
Attending the closing ceremony of the 2012 London Olympic Games. Photo / Getty Images
2013: The side sweep makes a more prominent appearance and curls are again thinner and more defined