Princess Mary’s special nod to Catherine, Duchess of Cambridge in her latest appearance

They're two peas in a royal pod.
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Princess Mary and Prince Frederik have stepped out for Flag Day, a national holiday which honours the Danish Armed Forces and their families.

Looking as elegant as ever, the royal donned an olive Beulah London midi dress with modified sleeves to remove the ruffles, along with Gianvito Rossi nude pumps.

This isn’t the first time we’ve seen Mary wear the sophisticated dress. The royal opted to don the Midi dress while attending the opening of Campus Horsens at VIA University College in Horsens just over a year ago.

Mary and Frederik attend Flag Day.

(Image: Det danske kongehus Facebook)

In a special touch, Mary’s not the only royal who owns the frock.

Catherine, Duchess of Cambridge has also been seen donning the green number.

Most memorably, Kate wore the dress while visiting the Family Action charity in Lewisham, south London in 2019.

She accessorised the outfit with a black crocodile print belt and grey suede heels.

Kate Middleton has also been spotted donning the frock.

(Image: Getty)

Like Mary, Kate altered the sleeves to remove the ruffles.

Mary’s appearance comes a month after she and Prince Frederik announced the new school that her children, Prince Christian and Princess Isabella, have enrolled in following allegations of bullying which permeated Christian’s old school, Herlufsholm Boarding School.

When the summer break ends, Christian will begin the new school year at Ordrup Gymnasium (Ordrup High School) in Gentofte, north of Copenhagen.

Mary has previously worn the green number.

(Image: Det danske kongehus Facebook)

Meanwhile his sister will begin her senior education at Ingrid Jespersens Gymnasieskole (Ingrid Jespersen’s High School) in Copenhagen.

The siblings were originally meant to complete their senior studies together at Herlufsholm Boarding School, where Christian is a year ahead of his sister.

However claims emerged in May of “systematic bullying” and a “culture of abuse and violence” at the institution, which left Mary and Frederik “deeply shaken.”

“As parents of a child who goes to Herlufsholm, we are deeply shaken by the testimonies that have emerged in the current documentary about the school,” they said in a statement at the time.

WATCH: Kate Middleton and Princess Mary reunite in Denmark. Article continues after video

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“It is heartbreaking to hear about systematic bullying and about the culture of abuse and violence that many have been a part of. That is completely unacceptable.

“As parents, we expect the school to effectively ensure a culture where everyone is safe and part of the community, and we will in the coming time follow the changes that are obviously necessary.”

The bullying allegations were exposed by a Danish TV documentary and led the couple to later announce they were “questioning” their children’s places at Herlufsholm Boarding School.

“The question about our son Christian’s and our daughter Isabella’s choice of school has been very important for us, and the unfortunate matter has brought many and strong opinions into play in the public,” the couple said in a joint statement in June.

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