Sienna Miller's Bikini Is So Devilishly Sexy, It Plays Psychedelic Tricks on Your Eyes

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Sienna Miller is just the latest of the celebrity pack to land in Portofino for vacation. The star lounged on a boat with a group of friends, showing off her crochet bikini (which we're pretty certain is from the Italian brand Missoni) from every angle as she jumped in a kayak and sunbathed on the deck. Sienna's look was complete with a pair of dark Ray-Ban sunglasses and some gold jewelry, but she need not accessorize further since her swimsuit did all the talking.

While her design appeared to be purple from the front, it was sea green from behind, which, in our opinion, makes this even better than a reversible design. Read on to see some close-ups of the adorable two-piece, then shop similar colorful options that will, at the very least, make them all look twice.

Missoni Mare Chevron-Knit String Bikini
Barneys New York

Missoni Mare Chevron-Knit String Bikini