If Sienna Miller wears something once, we take note. If she wears it twice? We start adding it to our baskets immediately.

Just ask Sienna Miller, who was recently spotted filming in London wearing the perfect dark khaki car coat-style trench ...

Sienna Miller's first Sézane trench coat has the exact same single-breasted cut, plaid lining, and neat row of tortoiseshell buttons as her second. She styles it the same way as her new version, too, ...

The actress was photographed while in London wearing a khaki green trench coat, under which she'd layered a chunky roll ... The trench comes in a host of sophisticated neutral shades, including Miller ...

A striped breton top, black cigarette pants, point-toe heels and thrown effortlessly on top, a classic beige trench coat. C’est magnifique ... and trainers. A sage green colour is a different ...

Whether it's a white leather version or a borrowed-from-the-boys olive green one, no trench coat escapes me. But year after year, they start to look boring—the same double-breasted look with the ...