Alright so I actually tried out Sienna Miller’s whole style thing last month. Felt impossible at first but figured out some tricks. Let me just spill how it went down step by step.

The Starting Point: Total Mess
First off, I Googled “Sienna Miller street style” and scrolled through maybe 500 photos. Everything looked stupidly effortless but crazy expensive. My closet? Mostly graphic tees and one sad blazer from job interviews. Needed a complete overhaul.
The Hunt Begins (Mostly Failed)
Hit up thrift stores first. Wanted those flowy boho skirts she wears. Found zero skirts but bought this awful mustard cardigan thinking it looked “vintage.” Spoiler: it looked like grandma’s dust rag. Total waste of $8.
Switched to fast fashion online. Ordered:
- A white peasant blouse
- Fake leather trousers
- Some tassel earrings
The blouse ripped when I tried it on. The trousers made me look like a stuffed sausage. Only the earrings survived.

The Pivotal Moment
Nearly gave up until I saw her in just jeans and a white tee. Wait – maybe basics are key? Dug through my drawer and found:
1. Faded high-waisted skinny jeans
2. An actually decent white tee (no pizza stains!)
3. My mom’s old oversized denim jacket
Put them together and bam – instant Sienna vibes. Felt ridiculous for overcomplicating it.

Accessory Armageddon
Started watching how she accessorizes:
- Always layered necklaces
- Beat-up ankle boots
- Sunglasses indoors (tried this at Starbucks – got weird looks)
Rummaged my jewelry box. Choked a gold chain, layered it with my thin silver necklace. Clashed horribly. Settled for one dainty chain plus hoop earrings. Way better.
Hair Disasters
Her messy waves? Impossible. Used my curling wand, got Shirley Temple ringlets. Washed it out. Next day used salt spray and braided damp hair overnight. Woke up looking like a scarecrow. Third attempt: air-dried hair + quick twist with straightener. Acceptable mess achieved.

The Final Test
Wore the whole outfit to brunch:
Mom’s denim jacket
White tee knotted at waist
Skinny jeans
Old tan ankle boots

One necklace + hoops
Friend actually said: “Whoa, Sienna Miller much?” Nearly choked on my avocado toast. Mission accomplished.
Biggest Lessons Learned?
- Stop buying crap you’ll wear once
- Raid your mom’s closet seriously
- Messy hair > perfect curls
- One necklace is plenty
Spent under $20 fixing my wardrobe. Still avoiding indoor sunglasses though. People stare.