Sienna Miller Just Wore the Boho Dress and Boots Formula Everyone Will Copy This Autumn

When it comes to fashion, Sienna Miller is typically a season or two ahead of the rest of us. Somehow able to see into the future, the style icon seems to predict the upcoming season's biggest trends well before we've wrapped our heads around this season's.

Attending the L.A. premiere of her latest film Horizon: An American Saga, Miller stepped out in an elegant ensemble that looked fresh off an autumn mood board. Wearing a flowy white dress with lace embroidery, ruffle detailing and slim spaghetti straps from Chloé’s S/S 25 collection, the actor picked up on the key summer trend destined to seep into the latter half of the year, too.

Whilst we always see white midis and minidresses dominate throughout the warmer months, this autumn, we anticipate that hemlines will drop as the pretty white dress takes on a longline form. Treating us to the ultimate autumn-ready paring early, Miller wore her breezy dress with a pair of black knee-high boots, crafting a cool-weather look that remains loyal to her iconic boho-chic style. She took a pared-back approach to accessorising the look, selecting simple pieces that elevated her look effortlessly. Wearing an elegant gold choker and a dainty charm bracelet, Miller's jewellery added polish to the overall edgier look.

Eager as ever to emulate her style, read on to shop Miller's latest outfit as well as our edit of the best white dresses and black knee-high boots.

SHOP SIENNA MILLER'S LOOK:

Urban Outfitters

Kimchi Blue Odessa Midi Dress

£59

Just add knee-high boots.

Jennifer Fisher

Weightless Hollow Tube Gold-Plated Choker

£475

This is the easiest way to elevate an outfit.

Bottega Veneta

Tex Leather Knee-High Boots

£1660

Style with a cotton mini throughout the summer months.

Pacharee

Spirit Animal Gold-Plated Pearl Charm Bracelet

£520

Layer with gold bangles or wear on its own.

SHOP OUR EDIT OF THE BEST WHITE DRESSES AND BLACK KNEE-HIGH BOOTS:

Reformation

Balia Linen Dress in White

£298

This pretty linen dress is a summertime favourite amongst fashion people.

M&S Collection

Leather Block Heel Knee High Boots

£110£83

Shop these classic boots whilst they're on sale.

Nobody's Child

White Fitted A-Line Marina Midi Dress

£85

Style on its own or throw on a navy jumper if the weather starts to turn.

Staud

Wally Leather Knee Boots in Black

£475

The small heel makes these feel so elegant.

M&S Collection

Pure Cotton Strappy Midi Cami Waisted Dress

£40

This comes in sizes 6–24.

COS

Knee-High Leather Cowboy Boots in Black

£270

Style with a white dress or wear with long denim shorts.

COS

Open-Back Tiered Midi Dress in White

£95

The ruched detailing at the back adds an elevated edge.

Chloé

Eve Leather Boots in Black

£1190

Sienna Miller is practically the poster girl for Chloé at this point.

Free People

Struttin' Midi Dress in Ivory

£78

This also comes in 11(!) other colours.

Khaite

Dallas Leather Knee Boots in Black

£1260

There's a brown suede iteration if that's more your thing.

Chloé x Atelier Jolie

Scalloped Silk-Cady Gown in White

£1885

The subtle scallop detailing adds such a pretty touch.

Reformation

Nancy Knee Boot in Black Leather

£448

Style with linen shorts or wear with a voluminous dress.