Duchess Kate rocks rare ponytail and channels Princess Diana in pink polka dot dress

The Duchess of Cambridge is stepping out in style while touring Ireland!

While capping off the second day of her and her husband Prince William's royal tour in the Emerald Isle, the duchess dazzled in a vintage pink polka dot Oscar de la Renta dress that she wore during a reception at Dublin's Museum of Literature.

She paired her pretty-in-pink ensemble with a black clutch and matching black Jimmy Choo pumps. Her look was complete with her hair done in a ponytail, which is rare compared to her signature blowout hairstyle.

Many online immediately drew comparisons to a similar outfit that the late Princess Diana wore in 1985 while on a visit to Rome.

Earlier that day, Kate, who is no stranger to rewearing great pieces from her wardrobe, was spotted in a white Reiss Olivia peacoat, which she paired with black pants and booties.

If you have been following Kate's style, you may have noticed she first was seen wearing the coat in 2007 to accompany William to his cousin Peter Phillips' 30th birthday party.

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The Duchess of Cambridge also wore her go-to Reiss coat the following year to William's graduation ceremony from Central Flying School at RAF Cranwell.

Kensington Palace later posted a video where the royal couple are seen wearing aprons as they cook together at the Savannah House, which is run by social justice charity Extern and provides a safe space to support vulnerable young people and families who are going through challenging times.

"The Duke and Duchess of Cambridge joined young people supported by the charity for a range of activities that helps to equip those at Savannah House with key life skills, including budgeting, meal planning, and most importantly…cooking and healthy eating," Kensington Palace noted in a caption.

William and Kate will continue with their tour through Thursday before returning back to England.