Earlier this week, Sienna Miller wore the perfect bank holiday look: It's something I plan on copying and living in for the next 48 hours. Sienna wore a midi checked dress with a circular clasp on the belt and short sleeves (word to the wise—it's £595 from Isa Arfen). Checks are still key for 2018, however, instead of being limited to grey heritage prints, checks are now coming in more vibrant and interesting colour patterns, as seen with Sienna's rainbow print. She paired her dress with a pair of sensible leather sandals and a yellow-leather tote bag. Keep scrolling to see and shop Sienna's perfect bank-holiday wardrobe.