Princes William and Harry Agree It’s Now Time to Do This for Their Mother

Can you tell the difference in these hats?

Princess Diana broke out her plaid Catherine Walker coat for trips to Japan, Scotland, and an English children's hospice. The duchess chose a plaid coat to visit a children's hospice in October 2016.

Like Diana, Kate is a fan of Superga sneakers. The late Princess famously wore them during her charity efforts in Angola in 1997, while Kate recently opted for a white pair while cheering on runners from the sidelines of the London marathon.

This isn't the fist time we've seen Kate mirror Diana's love of polka dots! Nonetheless, the Duchess undoubtedly nails the look once again.

Princess Diana donned the Cambridge Lover's Knot tiara, reportedly her favorite tiara, during a 1983 banquet in Auckland, New Zealand. The duchess wore the same headpiece to the Diplomatic Reception in December 2016.

Of course, Kate couldn't help but steal this look from Diana's style repertoire. Both ladies look truly stunning in all-over white lace!

Both Kate and Diana have a thing for baby blue—and boy do they look stunning. Kate's coat with a flared skirt is a chic update to Diana's '90s-influenced pencil skirt.

Kate Middleton and Princess Diana certainly know how to pull of a monochromatic look. And they're definitely not afraid to try something colorful!

On Remembrance Day, Princess Diana and Kate Middleton each honored soldiers who gave their lives to protect British citizens. Both wore wide-brim black hats and elegant black coat dresses, along with three red poppies, as is tradition.

The Duchess of Cambridge and Princess Diana excel at pulling off bright colors! Kate emulated Princess Di when she stepped out in a matching top and skirt set from London brand Eponine.

Kate Middleton and Princess Diana both love tweed skirt suits. The Duchess of Cambridge emulated her famous mother-in-law (right down to the black clutch!) when she stepped out in a Rebecca Taylor suit when she visited the Ronald McDonald House Evelina London.

No matter what color they put on, each looks fab (and warm).

Red seems to be the color of choice for these two--even on the ski slopes!

Both rock the brightly colored power suit, right down to the black belt!

Royal blue was the theme in both official engagement portraits. Kate now wears Diana's sapphire engagement ring.

After Diana's death, Harry chose the sapphire ring as a keepsake while William opted for her watch. But as his older brother got ready to propose, Harry gave it to him. What a nice guy!

Nothing like looking casual but stylish when you're watching polo.

Now they both seem to be channeling Jackie Kennedy!

Diana was in Pakistan; Kate was visiting a Malaysian mosque. Notice the buttons on each dress. Uncanny, right?

Yes, maternity dresses have come a long way. But both post-partum princesses chose blue polka-dotted outfits to introduce their newborn sons to the world.

You have to be pretty confident to pull this look off--but that doesn't seem to be a problem for either Kate or Diana!

One is a winter coat, the other a rain jacket. But they're similar!

The dresses are an identical color, but the body language between the two couples couldn't be more different. That gap between Diana and Charles is as wide as the English Channel!

Diana's sapphire earrings are more ornate, but Kate seems to love the gem, too.

It's obvious that Kate gets her love of Chanel from the stylish Princess Diana! The Duchess of Cambridge paid homage to the French fashion icon in this multi-colored tweed blazer dress and matching emblazoned belt. So elegant!