How very patriotic.

Ahead of King Charles’ coronation celebrations, Kate Middleton stepped out in London Thursday in a look that perfectly matched the Union Jack.

Representing the United Kingdom in style, the Princess of Wales wore a bold red Eponine London coat with a bright blue lining, which should look familiar to royal fashion fans.

The mother of three, 40, previously wore the look — which features a mandarin collar and large buttons down the front — twice before, including to the launch of a photography book she published in 2021 called “Hold Still” and again on a visit to Cardiff Castle during the Platinum Jubilee.

Underneath the wool coat, Kate sported a white Suzannah button-up dress ($3,620) she’s also worn on multiple occasions, including during a 2022 visit to the Grenfell Tower fire memorial.

This time around, princess paired the look with her Mulberry Amberley bag ($1,100) in white, Maria Black earrings ($376) and Jimmy Choo pumps ($695).

The Waleses, who recently celebrated their 12-year anniversary, visited the Dog & Duck pub and spoke with workers about how they’re preparing for King Charles’ coronation, which is set to take place on Saturday.

William kept it casual in a brown blazer with a light blue button-up shirt and navy pants.

They took photos with throngs of fans ahead of the biggest royal event in 70 years.

Despite the pomp and circumstance, the official anointing of Charles as king is set to be a very modern and decidedly dressed-down event.

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Kate and Queen Camilla will both wear “modernized” gowns — and there’s talk that Middleton will skip a tiara entirely for the event — while Harry is rumored to have been denied the opportunity to don typical military regalia and will wear a classic suit instead.

Camilla has chosen British fashion designer Bruce Oldfield, a favorite of the late Princess Diana’s, to design her coronation gown after the palace previously announced the ceremony will be a “scaled-down” affair.

Middleton, meanwhile, revealed that her outfit for the big day will similarly contain a “hint of blue,” in keeping with the classic colors of her home country.