I must admit that I think this summer’s fashion is the best in years. Sure, I adored the soft butter-yellow hues that danced over dresses and blouses last year, and pretty bloomer trousers were a revelation for comfort and style, but in 2026, the fashion set’s wholehearted embrace of boho has me completely captivated. Be it whimsical broderie anglaise tracing the bodices of blouses or voluminous balloon pants that feel straight out of the ‘70s, the free-spirited attitude is everywhere. And tell me, who’s better suited to lead the charge than Sienna Miller?
The patron saint of modern bohemia, Sienna Miller has perfected the undone ease of the aesthetic since the early 2000s. Think billowing babydoll dresses styled with belts and skinny jeans, or floaty minis finished with wide, studded belts and knee-high Chloé pirate boots (and lest we forget the studded cowboy boots and vintage vests she traipsed around Coachella and Glastonbury in). In fact, looking through her archive, almost all of the pieces would feel at home within the capsule wardrobes of many fashion people this summer.
This week, feeling nostalgic, I looked back through the wonderful street-style images Sienna has provided us with over the years and pinpointed the pieces she wore over and over. Thus, the ultimate Sienna Miller summer capsule wardrobe was born.
The Ultimate Sienna Miller Summer Capsule Wardrobe
1. Your Best Dress
Style Notes: Whether she’s jetting off to the Cannes Film Festival or attending the hottest parties in London, Sienna rarely spends a summer day without a dress. Be it a floaty Chloé maxi trimmed with frills or a structured, shirred mini whilst courtside at Wimbledon, she leans into playful details and neutral colours to give her signature boho zhuzh.
Shop Maxi Dresses:
Halternecks are everywhere this summer.
Whilst sold out in her cool cream shade, Chloé still has Sienna’s exact dress in a pretty sage green.
Dôen makes some of the best summer dresses on the market.
You can never go wrong with a stylish drop waist.
Style with strappy sandals and a raffia tote this summer.
2. Dutiful Denim
Style Notes: No summer capsule wardrobe is quite complete without a trusty pair of denim jeans—Sienna Miller’s included. Swapping her ‘90s skinnies for silhouettes far looser, her relaxed styles have a throw-on-and-go energy to them. One which pairs seamlessly with the loose tanks and pretty blouses she typically wears come warm weather. Bonus points if you style yours with a raffia tote and trainers.
Shop Denim Jeans:
These look almost identical to Sienna’s own.
These come in 23 colours.
Size up for a looser fit.
A Who What Wear UK editors favourite.
Zara makes some of the best high street jeans on the market.
3. Luscious Lace
Style Notes: Sienna Miller in Chloé is a match made in heaven, so naturally, silky soft lace-trim skirts feature heavily within her summer capsule wardrobe. Whether styled with a rugged leather jacket and wooden clog (as seen above) or finished with a matching blouse and sophisticated stiletto heel, it’s a staple that will keep you cool and float from day to night.
Shop Skirts With Lace Trims:
Style with ballet flats and a tank top this summer.
This has been all over my social media feeds this summer.
The lace underlay is a nice touch.
If you love lace-trim shorts you need to see this slip skirt.
Another stunning Dôen find!
4. Pretty Pullovers
Style Notes: Riddle me this—what’s summer without a pretty blouse? A staple within Sienna’s rotation for decades, its romantic allure lends a darling finish to the denim cutoffs and T-bar sandals that she typically wears during warm weather.
Shop Blouses:
If you like this M&S gem, I’d be fast as it’s selling out quickly.
A classic.
No one does vintage-inspired fashion quite like Rixo.
Style with bloomer shorts this summer.
This is exactly how I plan on dressing this summer.
5. Make it Mini
Style Notes: Skorts may be having a major moment this summer, but Sienna Miller’s been rocking them long since the trend cycle returned the silhouette. Be it distressed denim styles paired with practical cowboy boots at Glasto or sleek lycra ones finished with preppy polo tops and skyscraper heels, she’s been making a case for the abbreviated hemline since the early noughts. And honestly, I’m so here for it.
Shop Mini Skirts:
A fashion person’s favourite.
If you’re looking for Miu Miu on a budget, Guizio is the brand to know.
I’m obsessed with brown and pink this summer.
I wear this skirt at least once a week.
Just remember to wear dark knickers.
