Double denim, triple suede and a floral blouse - Sienna Miller's outfit is an easy-to-follow recipe for a polished spring look

We often hear about the "colour of the season" but if we had to pick a "fabric of the season" for spring/summer 2025 it has to be suede.

It was everywhere throughout autumn and winter too but it’s showing no sign of going anywhere and tan-toned suede and faux suede in particular has been surging in popularity. From suede jackets to trenches and bags, anything in this material brings both gorgeous texture and a luxurious feel to an outfit.

Combine with versatile blue denim pieces and you’re on to a winner - as Sienna Miller has just showcased to perfection. The actor and model attended her sister Savannah’s Bridal Ballerina Breakfast on 1st April wearing double denim and triple suede with a floaty boho shirt.

Recreate Sienna's Outfit

Of all the denim trends for 2025, double denim is the one that we know will keep coming back into fashion. We often see people embrace it with a shirt and jeans, but Sienna thought outside the style box with her look and wore a longline denim duster coat and jeans.

Both were similar mid-blue washes and the duster fell to her ankles and had a classic lapel collar, buttons down the front and handy pockets. The smart silhouette was balanced by the more relaxed fabric and we love how it draped over her wide-leg jeans.

Once you’ve found the best jeans for your body type you might tend to stick to them, but if wide leg styles haven’t been on your radar before they’re worth trying out. The looser shape makes them very comfortable to wear and they look especially chic with a more fitted top.

For double denim looks it can look lovely to mix in different tones, but Sienna Miller’s outfit was a masterclass in cohesion and so she opted to keep to the same mid-blue colour palette with her denim. She then took the same approach with her accessories and went for all tan suede pieces.

Her shoes were the Gucci horse bit ballet flats with a classic Mary Jane strap that runs along the top and helps to keep your feet secure. When you want a smart-casual outfit that makes you feel confident and fashion-forward but still easy to wear day-to-day then ballet flats will be your new footwear best friend.

They feel more elevated than trainers but mean you don’t have to reach for a heel. Sienna Miller’s slouchy tote bag was virtually the same shade of tan suede and her belt with its square buckle tied in with these other accessories.

As daunting as double denim - or triple suede - might sound, the actor and model showed how striking it can be. Matching accessories and/or different items of clothing instantly makes your ensemble feel very considered and polished, even when it takes moments to put together.

Digital Fashion Ecomm Editor at woman&home, Caroline Parr, has fallen in love with Sienna Miller’s outfit and thinks her choice of top finishes off her denim and suede look nicely.

"Those Gucci suede ballet flats have just gone to the top of my wish list for spring, and the double denim styling is perfection. An ankle-grazing denim trench coat is the item I never knew I needed - so chic! And a boho blouse to round things off is so Sienna," she says.

Sienna’s blue top appears to be either an original or a replica of an Ossie Clark and Celia Birtwell floating daisy blouse. It was semi-sheer and had a soft pink floral pattern which broke up the other materials with its feminine, flowy design.