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Sienna Miller has been ripping up the grass at the Coachella Valley Music and Arts Festival in California. The actress has been joined by pals Kelly Osbourne and Jared Leto at the annual festival which brings out the coolest and quirkiest of styles. With the UK's festival season not too far off the horizon, it's time to start planning your own summer-lovin' wardrobe. To copy Sienna's festival look keep reading...

It's no secret that Sienna Miller loves her Vivienne Westwood pirate boots, and she hasn't stepped out of them since she arrived at Coachella. While they don't come cheap, they are a great investment, pick up a pair for £295.

Her black playsuit by Young, Fabulous & Broke, has also been a favoured fashion item lately. Pick up a similar style from Topshop for just £35 (it is also available in cobalt blue).

Finally, it wouldn't be a 2008 summer outfit without a pair of wayfarers - in blue if you want to be bang on-trend. Don't panic if you don't have the cash for a pair of Ray Bans, there are plenty of similar styles on the market such as this pair from ASOS, at just £12 they're a steal!