Kate Middleton defied her own St. Patrick's Day fashion rule.

The Prince and Princess of Wales will visit the Irish Guards for St Patrick's Day.

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Kate is expected to wear green, which is her tradition for the patriotic event.

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Last year, Kate wore a military-style green coat with navy leather buttons.

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Kate usually wears green coat dresses on St Patrick's Day, but in 2015, she wore a dark gray coat instead.

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In 2016, Kate did not attend the St Patrick's Day parade.

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The annual engagement was canceled in 2020 and 2021 due to the pandemic.

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Kate often pairs her green coats with matching green heels and a green hat.

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