25 of Kate Middleton's Most Chic Sundresses

It's always nice when someone appreciates an outfit as much as the wearer, and it looks like the photographer wasn't the only one who was loving her sundress. Prince Louis seemed quite enamored with his mum as they watched Prince William compete in his charity polo match.

This light yellow sundress almost gave Kate a hefty wardrobe malfunction early on in her royal career, but she handled the unruly wind with all of the grace and class of a veteran duchess. 

There's no better way to admire a sweet sundress than Kate standing front and center in the midst of all the action, right? Although, no matter where the duchess is standing, the cameras always seem to find her ... and it's no wonder why!

Kate always brings her A-game once the Wimbledon tennis tournament rolls around every year, and this sweet polka dot number was definitely one of her best. People usually think of polka dots as juvenile, but Kate is here to tell us that this is definitely not true.

The two important things that make a regular dress have the sundress quality are definitely softness and flowiness. This baby blue number that the duchess wore back in the day definitely meets all of the requirements for a rockstar sundress.

We don't know quite how she does it, but Kate is the expert at rocking bright yellow sundresses. She has a couple of dresses in her fashion repertoire, but this sunny structured sundress is definitely one of our favorites.

Not only was Kate able to go casual with her adorable sundress, but she was also able to get away with wearing wedges -- all because Queen Elizabeth wasn't present. The monarch is known to dislike that footwear style, but that doesn't stop Kate from breaking them out with some of her more elegant sundresses.

Honestly, we love Kate when she's totally English and prim-looking, but one of our favorite Kate style is when she is completely ready for the beach. She and Prince William have taken a few tropical royal trips over the years, and she always breaks out her best sundresses.

The duchess of yellow strikes again! Seriously, most people are completely washed out by such a bright color, but Kate never fails to look completely glowy and radiant when she pops on a stunning yellow sundress like this one.

Oh the days when the Peter Pan collar was the style trend of the moment. Although most of us might look back and wonder what we were thinking, Kate can look back at this photo and breathe a sigh of relief. She made the Peter Pan collar timeless with this black sundress!

We just absolutely love how Kate never shies away from sporting bright colors. Even though she may not be as trailblazing with her royal fashion as her duchess counterpart Meghan Markle, Kate is bold in her own way. And we just love her for it!

Is there anything better than the wind actually cooperating and making a sundress look better? Nope! And it's also no surprise that our dear Kate managed to get the weather on her side while she was wearing this dressed-up sundress.

We love a good coordinated couple! Although Prince William's suit and deep purple tie isn't a direct match, there's no denying that he sure looks great up against Kate's pale yellow sundress. 

There's definitely no better place to wear a bright yellow sundress than the Wimbledon tennis tournament, right? Kate is always on theme and very animated during the tournament, and we'd be lying to say we didn't look forward to it every year just to see what the duchess puts on.

Lace on a sundress is pretty much the most perfect pair we could think of ... especially for our dear Kate Middleton. We all remember the amazing lace that was on her wedding dress, so any time she wears it from here on out, we can't help but get that fuzzy feeling again. We're sure she does too!

The trick for any royal mom (or any mom for that matter) is to find kid-proof sundresses. Kate definitely seems to have found a few that she can break out for those days when she has to chase around George, Charlotte, and now little Louis for hours on end.

This long-sleeved sundress is a little bit more out there than Kate usually wears, but no surprise to anyone, she looked absolutely amazing in it. We love when Kate really gets into the island mood during the Cambridges' tropical trips.

Who ever said a good sundress strictly has to be pale colors and simple lace? Kate has never been one to shy away from wearing bright patterns, and this geometric sundress is definitely one of her most elegant.

Who doesn't love when Kate breaks out a completely new outfit? Even though we had seen those trusty wedges before, her soft and muted sundress was a new addition to her closet. We hope we see this one many times in the future!

Our idea of a sundress and a sundress fit for a duchess are two very different things. Kate basically lives in fancy gowns and coat dresses, so when she wears something a little bit more casual in the summer, such as this beautiful pale pink number, it's pretty much considered a sundress for her. And it looks fantastic.

Visiting the National Maritime Museum, Kate brought out this simple but classy number, paired with what looks like Princess Diana's sapphire earrings. And the fact that she looks so happy? Well, that just must mean she loves this dress, too. 

There aren't too many sundress days in London, so Kate totally takes advantage of them when they come -- even if it means sporting a longer sleeve. This floral pattern is so fun, and we love the tie at the neck. It might be warm on an American summer day, but if the sun's out in London, this dress was probably perfect. 

Blue is one of Kate's best colors, and it looks gorgeous on her here. Don't get us wrong -- she looks good in white too, but this pop of blue florals really pulls the look together. Plus, it makes the outfit scream "springtime." 

Kate wore this dress for the Patron's Lunch to celebrate the Queen's 90th birthday. Something about these happy colors definitely seems perfect for a birthday to us! Not to mention the fact that, like we said before, blue is totally Kate's color.

For this one, we're taking it back to 2015. Remember when Kate had bangs? That hair trend may have passed for her, but she'd definitely still wear this dress on a sunny day in 2019. It's the perfect amount of business casual without being too stuffy.