Kate Middleton's latest project, 5 Big Questions on the Under Fives, has been almost a year in the making. So, we’re not surprised she opted for an ensemble with a very special meaning to announce the results.

Last week, the Duchess of Cambridge finally revealed the findings of what Kensington Palace calls the “biggest ever UK study on the early years.” Middleton and The Royal Foundation teamed up with research company Ipsos MORI for a country-wide survey to learn more from parents, families and kindergarten workers about children under five.

In the video, Middleton opened up about one of the findings and said, "Ninety-eight percent of you said that nurture is essential to lifelong outcomes. But just one in four actually recognize the specific importance of the first five years of a child’s life."

And while we’ve been waiting for these results for what seems like ever, we almost missed the fact that this isn’t the first time we’ve seen her specific ensemble, a blue dress by Reiss. In fact, she wore the royal blue, double-breasted piece for her first public speech as a royal, back in March 2012, when she opened the Treehouse in Ipswich, England.

And, as it turns out, the dress might actually be a hand-me-down from her mother, Carole, who was seen rocking the piece back in 2010.

So, not only was the dress a royal rewear but also a vintage piece from her mother. And we couldn’t think of a better occasion to wear it.

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