Kate Middleton violates tradition with St. Patrick's Day outfit.

Princess Kate and Prince William celebrated St. Patrick's Day with the Irish Guards in Aldershot.

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Kate is the new honorary Colonel of the regiment after being given the role by King Charles.

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William offered a farewell speech, while Kate said it was an honour to become Colonel Catherine.

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Kate donned a custom Catherine Walker coat dress with military-inspired styling and a gold Irish Guards Shamrock Brooch.

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It was Kate's second outing with the Irish Guards since becoming Colonel of the regiment.

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