Sienna Miller’s ‘favourite’ £75 Marks & Spencer blazer is a dupe for £400 Anine Bing jacket

ok.co.uk:

When two iconic fashion forces collide there's bound to be an exciting creation as a result, and it's fair to say M&S's latest autumn collection has certainly caused a stir.The much loved British high-street brand has teamed up with the ultimate cool girl Sienna Miller for their autumn campaign titled ‘Anything but Ordinary.’ Not only does it capture the true essence of Brit Dressing, the collection reflects Sienna’s relaxed, effortless style in which fans have grown to love her for - however, without the high-end price tag.

Commenting on the designs, Sienna said, "I have always had a genuine love for Marks & Spencer. "It's a brand that is part of the fabric of British life and holds special associations for so many people.

I am thrilled to be joining this iconic company, fronting their autumn campaign and being a part of their journey in shaping the future of fashion." Sienna has picked out her favourite item from the collection.

She loves the Tweed Relaxed Checked Blazer, which retails at £75 and comes in sizes 6-18. M&S describes the item as an "elevated layering piece".The product description reads: "A heritage check and tweed fabric ensure this blazer is an elevated layering piece.