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Kate, Duchess of Cambridge, wore the chicest St. Patrick's Day outfit (of course)

We can always count on the duchess to put her own stylish twist on a dress code.
Image: The Duke And Duchess Of Cambridge Attend The Irish Guards St Patrick's Day Parade
The Duke and Duchess of Cambridge attend the annual St. Patrick's Day Parade at Cavalry Barracks in Hounslow, London.Getty Images
/ Source: TODAY

We can always count on the former Kate Middleton to put her own stylish twist on a dress code.

Case in point: Saturday's celebration honoring the Irish Guards at the Cavalry Barracks in Hounslow, London, where the Duke and Duchess of Cambridge attended the annual St. Patrick's Day parade.

Catherine, Duchess of Cambridge, dressed in an emerald ensemble at the annual event honoring the Irish Guards.Getty Images

In the spirit of the day, the duchess wore a fur-lined, emerald coat by Catherine Walker, one of her favorite designers. In the spirit of her impeccable personal style, she accessorized it with a matching cap, dainty drop earrings, classic black pumps — and of course, her adorable baby bump!

Only the duchess could make us want to wear a shamrock boutonniere.Reuters

The duchess is about eight months along in her pregnancy (she's due in April), so she opted for water in lieu of a Guinness pint this St. Paddy's Day. (Last year, she did indeed enjoy a round!)

Prince William enjoys a Guinness pint while the pregnant Duchess of Cambridge opts for water.Getty Images

She did appear to have plenty of energy, passing out sprigs of shamrock and beaming as she mingled with the Irish officers. She and her husband, Prince William, were greeted with a parade of 350 troops led by their mascot, an Irish Wolfhound named Domhnall.

The duchess stopped to chat with subjects of all species.Getty Images

It appears a festive time was had by all ... and the duchess now has one more chic maternity dress in her arsenal.