Sienna Miller Just Wore the Perfect Casual Jeans Outfit, and I Already Own Every Single Item

I have long been an admirer of Sienna Miller's effortless style, and it seems that this won't be changing any time soon. After a whirlwind trip to Cannes Film Festival where the actor stole our attention in a boho-inspired Chloé gown, she's once again become a talking point in theBest Knockoff Luxury Clothing UK office, this time for her elevated take on off-duty style.
Stepping out in London this week, Miller crafted a polished ensemble that's just become my template for easy weekday elegance. To contrast the formal feel of a grey blazer, she styled it with the sleeves casually scrunched up to her elbow, showing some skin and relaxing the smart piece. Leaning further towards the casual side, she selected a pair of billowing horseshoe jeans to add volume to her look, along with a slouchy suede bag from Jimmy Choo to accessorise.
Finessing her outfit with some polished additions, Miller layered on two gold chain necklaces and selected a smart pair of pointed-toe boots to add an angular element to the slouchy shape of her jeans and bag. Inspired by Miller's styling choices, I'm eager to emulate this look at home, and luckily for me, my wardrobe already contains all of the staple items that make up the chic, celebrity-approved outfit.
To re-create Miller's look, style a blazer over your favourite wide-leg jeans and reach for a well-loved slouchy bag to finish it off. If, however, you're in the market for some fresh wardrobe additions, read on to discover the actor's style below, and see our edit of the best wide-leg and horseshoe jeans to shop this season.
SHOP SIENNA MILLER'S LOOK:
SHOP OUR FAVOURITE WIDE-LEG AND HORSESHOE JEANS:
Arket's Cloud jeans have become cult at this point.
Alaïa's barrel-leg jeans are a fashion person's favourites.
Style with pointed-toe kitten heels to add a polished effect.

Natalie Munro isBest Knockoff Luxury Clothing UK’s news writer and has worked in the fashion industry since she graduated with a degree in Journalism from the University of the Arts London. Natalie’s experience in the industry spans journalistic and styling roles that have seen her work for publications including British Vogue, Conde Nast Traveller, Vogue Ukraine, AnOther Magazine and Elle UK.
With an interest in uncovering Wholesale Replica Bag fashion trends, Natalie takes a leading role in identifying news forBest Knockoff Luxury Clothing UK. Reporting on a daily basis, Natalie focuses on trends on and off the runway, as well as street style and celebrity fashion. Natalie also creates content forBest Knockoff Luxury Clothing ’s social channels including TikTok and Instagram on a weekly basis.
-
Cool It On the Skinny Jeans—Chic People Are Wearing These 6 Fall Denim Trends Instead
Are you taking notes?
-
Dua Lipa and Miley Cyrus Traded In Their Dark-Wash Denim for This '90s Throwback
Halle Berry and Cindy Crawford also approve.
-
If I Spot You Wearing This Chic Blazer Trend Instead of a Traditional One, I'll Know You're a Fashion Person
Something might be missing, but don't worry.
-
Kylie Jenner Just Declared This "Dated" Denim Trend Is Still In—But Only Styled *This* Way
Take note.
-
Basic Jeans Aren't Out, But This Denim Trend Feels Way More 2025
It's not white, dark wash, or chocolate brown.
-
Don't Overthink Your Next Outfit—Just Throw On This Basic to Elevate Your Jeans
It's a classic.
-
9 Denim Trends That Will Make You Look Like a Fashion Person This Fall
Shop them for under $150.
-
Still Over Skinny Jeans? This Elegant Denim Trend Is Making a Major Comeback for Fall
Get ready.