Just when you run out of summer outfit inspiration, Sienna Miller is spotted in yet another enviable look. Shockingly though, you can actually find this budget-friendly piece. She carried a graphic tote, as well as her daughters backpack, while sporting a baby blue Mango gingham dress in the shape of now. She stayed on trend, as always, with acetate sunglasses and a pair of mustard colored, block-heeled shoes. We're taking notes, Sienna.