Sienna Miller's Wimbledon Outfit Is the Ultimate British Summer Look

Sienna Miller, always cool, touched down at Wimbledon in the most perfect outfit for battling the British summertime. We don't know whether she'd checked out our five-piece formula for cracking the dress code in this unpredictable weather (one can dream), but she's certainly got the idea down to a fine art—from the whimsical-but-covered-up dress down to her patent (and therefore rain-resistant) brogues.

Scroll down to see how Miller's nailed the Blighty fashion tightrope, plus you can shop from her look…