Proof That Sienna Miller's Bohemian Style Is All Grown Up

Getty | Gustavo Caballero

Sienna Miller has put down the flower crown. From her days of slouchy denim and loose flowing tops and dresses, Sienna has moved on to tailored separates, structured bags, and dark sunglasses. In short, she's having what we'd call a "Siennasance," an outbreak of street style looks so good, we can't help but take a tip from them all.

Read on to see how the birthday girl, who turns 35 today, has taken her outfits from rugged bohemian to polished and elevated and even started a few trends along the way. We'd argue that these crisp, casual ensembles give her most elegant red carpet gowns a run for their money — just try to tell us you don't agree.

01

Sienna Polishes Off Airport Outfits With a Pair of Western Wedges

02

She Mixes Black, Navy Blue, and a Bit of Leather In NYC

03

When in Doubt, Sienna Sticks to Her Burberry Essentials

04

She Uses Textured Separates to Highlight Her Changing Hair Color

05

Sienna Got Her Hands on the Luxe Gucci Loafers of Our Dreams

06

She Knows She'll Look Just as Spiffy When She Covers Her LBD With a Camel Coat

07

Sienna Balances Her Printed Dresses With Sleek Coordinated Accessories

08

Her Lacy Crop Tops Have Buttoned-Up Collars

And they're even finished with pencil skirts and crisp coats.

09

Sienna Does Slouchy Workwear the Fashion Girl Way

Add chic sandals and a Céline tote. Bonus points if it fits your laptop.

10

She Sticks With Her Favorite Labels, Because They Always Work

This ribbed Céline dress was just bright enough to make a statement and just loose enough to appear breezy and effortless.

11

Sienna Pairs Her Sundresses With Cozy Cardigans and a Luxe Bag

12

She Even Fancies Herself a Crisp Blazer From Time to Time

And those pumps! Don't think we didn't take note of those pumps.

13

Sienna Knows How to Style Her Neutrals

14

She's in on All the Latest Trends

Sienna sees the wrap-and-tuck and raises you one asymmetrical skirt.

15

Even Her Cozy Airport Style Gets Some Extra Oomph

With the help of a chic Burberry poncho and a cadet hat, of course.

16

Every Chic Woman Knows How to Mix Navy and Black

17

. . . And Black and Royal Blue, For That Matter

18

Sienna Accents Her Outfits With a Touch of Gold

19

Her Denim Cutoffs Get Cinched With a Belt and Paired With a Lovely Blouse

20

She Doesn't Overdo It on the Stripes

The ribbon around her fedora plays up the detail on her sweater perfectly.

21

Sienna's Chiffon Maxis Aren't Overly Breezy

She wears them; they don't wear her.

22

She Practically Started the #WhiteJumpsuit Trend

Her Galvan design was just so chic.

23

Sienna Can Make an LBD Work With a Pair of Sandals

24

When She Adds a Touch of Leather, It Pulls Her Whole Look Together

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