During her first St. Patrick's Day as Colonel of the Irish Guards, Kate Middleton stunned in a turquoise coat and hat.

Catherine Walker's military-inspired coat dress had eight covered buttons, a high notched collar, shoulder pads, and sharp pleats for Middleton.

She paired her coat with a Jane Taylor hat with pleated crinoline trim and emerald drop earrings with diamond accents.

Middleton acquired a gold Irish Guards Shamrock Brooch for the event.

She debuted a new color of her often-worn Gianvito Rossi suede pumps in a teal hue.

Middleton handed out shamrocks to attendees and added a large spring of the lucky greenery to her own outfit.

In 2015, she wore a brown cloak and pillbox hat when pregnant with Princess Charlotte.

At a socially distant celebration, Middleton wore a Zara blazer and a vintage coat dress in green.

After the parade, Middleton and Prince William joined troops inside for some friendly chats and a pint of Guinness for a royal toast to the holiday.