Sienna Miller is clearly enjoying soaking up the sun at the beach. The 37-year-old actress is currently vacationing in Tulum, Mexico, and showed off her toned physique in a black bikini. Her flattering swimsuit came with a scoop-neck top and a pair of tiny bottoms in the same hue. Her flattering two-piece had me wishing I could teleport to Mexico for vacation, stat. Scroll on to see all angles of her bikini and shop similar styles for your swimsuit drawer.