After the unprecedented attention her regrowth received it's no wonder she decided to go for the ultimate coverage with a darker hue.
Kate debuted her uber-glossy locks at the SportsAid Ball last week where she teamed her newly dyed tresses with a beautiful little black dress by Temperley. And yes, it has already sold out!
She paired the classic lace frock with a pair of Jimmy Choo pumps and a suitably festive red clutch.
With plenty of warm reddish undertones and her signature shiny finish, it seems Kate is well and truly top of our hair icon list again.
In keeping with her perfectly polished style, Kate stayed with her iconic tousled waves and bouncy blow-dry, letting the colour change take centre stage.
She's also tidied up her ends by chopping off a couple of inches - thanks for the reminder Kate, the Christmas cut is well and truly pencilled in our diaries.
The Duchess recently parted with long-term hairdresser James Pryce, who created her demi–chignon style for her wedding. Is this the work of her new stylist then? If so it's got our approval.
Her winter hair makeover might not be the drastic 'do you were hoping for but a shocking hair transformation isn't really how the royals roll.
We're loving her new look, however subtle it is, but what do you think? Tweet us @sofeminineUK!