Sienna Miller Just Wore the Casual Errand Outfit That I'm Copying This Weekend

There are some age-old styling conundrums that come back around year after year, decade after decade that we still struggle to answer. "What do I wear to a wedding?", "what do I wear to work?", and "how do I dress up jeans?" being the most common (and somehow the answer always ends up being a "nice" top), but there is one scenario in particular that I'm almost certain you've never asked out loud but have always wanted to know the answer to: "What do I wear to run errands?"

You see, TikTok has attempted to answer the question, and people in their thousands are flocking to see the response. After all, we're all familiar with the scenario. The weekend rolls around and your to-do list is growing in length, so you need an outfit that is both "throw-on and go" and effortlessly stylish, so what exactly does one wear that will look as good doing a food shop as it will meeting your friends for brunch? Well TikTok, I think I just found the answer, and it comes courtesy of Sienna Miller. 

Sienna Miller Just Wore the Perfect Casual Errands Outfit



Most will not be surprised that Sienna has served as our fashionable inspiration yet again. After all, she recently revived the cargo jean, showed us how to take the maxi skirt into evening territory, and set the tone for all bridesmaid dresses this year, but it's her latest dressed-down look that is ticking all of our boxes. 

Perhaps taking notes from the 2X2 outfit formula (that I promise you, always works,) Sienna's anti-jeans, pro-tailoring weekend outfit is not only a masterclass in high/low dressing, but is also the perfect outfit to wear with trainers. Maybe it's the tonal, grey colour palette, maybe it's the well-cut, boxy blazer, it could even be the relaxed, straight-leg trouser, but something about the combination of all three works, and gives us a laidback outfit that's incredibly easy to replicate. So, wondering what to wear this week? I've reconstructed Sienna's outfit below, so you can wear it for work, the weekend and everything in between. You can think me later. 


Until we can find the exact jacket Sienna is wearing (and we're keeping our eyes peeled!), this is an excellent lookalike from one of her preferred high-street brands. 

When it comes to quality basics, there's no better place to start than Arket. 

It's all about the fit, and these slouchy H&M trousers look so premium. 

You're going to have to be quick off the mark to snap these up before they sell out. Again.


If you're looking for an exaggerated silhouette, it has to be The Frankie Shop. 

Linen blazers are going to come into their own in summer. 

Nothing says "spring" quite like gingham prints. 

Every wardrobe should have a good black blazer. It might just be the most versatile piece you can own. 


I love the ultra high-waist on these. 

Technically a wide leg as opposed to straight, but these would be so chic with a t-shirt and trainers.

The Mason pant we know and loved is now in a cropped style to show off your shoes. 


It's official–we're still obsessed with New Balance.

Name a sharper pairing than a tailored trouser and an all-white trainer. I'll wait...

Fashion people agree, Loewe accessories are worth investing in. 

Bored of white but need a trainer that will go with everything? Try refined brown suede.