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

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
Getty

Sienna Polishes Off Airport Outfits With a Pair of Western Wedges

02
She Mixes Black, Navy Blue, and a Bit of Leather In NYC
Getty

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

03
When in Doubt, Sienna Sticks to Her Burberry Essentials
Getty

When in Doubt, Sienna Sticks to Her Burberry Essentials

04
She Uses Textured Separates to Highlight Her Changing Hair Color
Getty

She Uses Textured Separates to Highlight Her Changing Hair Color

05
Sienna Got Her Hands on the Luxe Gucci Loafers of Our Dreams
Getty

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
Getty

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
Getty

Sienna Balances Her Printed Dresses With Sleek Coordinated Accessories

08
Her Lacy Crop Tops Have Buttoned-Up Collars
Getty

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
Getty

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
Getty

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
Getty

Sienna Pairs Her Sundresses With Cozy Cardigans and a Luxe Bag

12
She Even Fancies Herself a Crisp Blazer From Time to Time
Getty

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
Getty

Sienna Knows How to Style Her Neutrals

15
Even Her Cozy Airport Style Gets Some Extra Oomph
Getty

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
Getty

Every Chic Woman Knows How to Mix Navy and Black

17
. . . And Black and Royal Blue, For That Matter
FameFlynet

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

18
Sienna Accents Her Outfits With a Touch of Gold
Getty

Sienna Accents Her Outfits With a Touch of Gold

19
Her Denim Cutoffs Get Cinched With a Belt and Paired With a Lovely Blouse
Getty

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

20
She Doesn't Overdo It on the Stripes
Getty

She Doesn't Overdo It on the Stripes

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

22
She Practically Started the #WhiteJumpsuit Trend
Getty

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
FameFlynet

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
FameFlynet

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