Sienna Miller, queen of boho, has had a mod makeover for Winter. Even she must have been bored of tiered skirts, loose waves and 'she nicked my style' outrage from Kate Moss. She's cut that man right out of her hair with a chic new bob (OK, it's for a film role...) and ditched the cowboy boots for retro platforms. She's still toting squashy leather bags and reviving Ugg boots, but her new look is much more 60s chic than Primrose Hill princess. Want to get the look before everyone else? Here's your key pieces...

The Skinny Jeans
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Sienna is a fan of cult label Tsubi's washed-out grey skinny jeans, which are (of course) very difficult to get hold of and pricey when you finally do. Primark do a good copy for a stupidly low price (about £12) but the can be equally difficult to get hold on. A better bet would be the 'Squin' style from H&M's fabulous new &Denim range for £29.99, ASOS's Ichi drainpipe stretch jean for £35 or, if you fancy splashing out a little, Diesel's 'Keate Stretch' jeans for $170.

The Platform Heels
Siennaplats
When it comes to platforms, there's only one designer the celebs turn to, and that's Terry de Havilland, who was massive in the 70s and has now launched a new collection which Sienna has been spotted sporting. Luckily, he's also come up with a slightly more affordable diffusion line. The D-Havz shoes aren't for the faint hearted, though. They're serious 70s glam rock! Left to right are Courtney (£80 / €120), Tamia (£80 / €120), and a suede D-Havz design available at ASOS for £80 / $152.

The Funky Capelet
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Earlier in the season Sienna was spotted in Morgan's military jacket, but now she seems fonder of capes and capelets over long sleeved tops. Gap's bracelet sleeved capelet is perfect for this look and is now reduced to $49.99. Topshop's moleskin bolero jacket for £50 is bound to be a quick seller, while Monsoon's faux fur cape (£65) is great for keeping you warm and stylish.