M&S: Buy Sienna Miller's 'favourite' blazer in stylish collection

Sienna Miller has launched a new collection - Anything But Ordinary - with M&S and it's full of new season gems, with prices starting at just £15

Sisters Savannah and Sienna Miller lend style to high street brands, Fashion

Sienna Miller partners with Marks & Spencer on its autumn range

Sienna Miller For M&S, Kate Moss For Anine Bing And An Exciting Dublin Pop-Up: Here's The News You Need To Know This Week - The Gloss Magazine

Sienna Miller partners with Marks & Spencer on its autumn range

Sienna Miller partners with Marks & Spencer on its autumn range

We're obsessed with the Sienna Miller x M&S collab - here are the 9 best pieces

Shoppers say 'Marks and Spencer are back with a vengeance' with new colourful autumn collection - MyLondon

Sienna Miller x M&S Autumn: the capsule wardrobe collection everyone's going crazy for

Safe Holly vs Cool Sienna: who will lead M&S into battle for the UK's wardrobes?

M&S unveil £99 'coat of the season' but shoppers are distracted by model Sienna Miller: 'She is the moment' - MyLondon

M&S unveils new Best of British collection

Sienna Miller x M&S Autumn: the capsule wardrobe collection everyone's going crazy for

Sienna Miller's 'favourite' £75 Marks & Spencer blazer is a dupe for £400 Anine Bing jacket - OK! Magazine

Sienna Miller's collection for M&S is a capsule wardrobe perfection.