Jessica Chastain, Reese Witherspoon
Credit: Paul Marks/Broadimage; Steve Granitz/WireImage

It's Shark Week on the Discovery Channel! And because those great big monsters of the sea can be spooky, we’re taking a look at the ocean creatures that inspire fashion—mermaids. Reese Witherspoon and Jessica Chastain are both fans of the fit-and-flare look the mythical sea stars are known for, and we are, too. Click through to see more famous faces in the sea silhouette we love. And, for those brave souls who dowant tosee some sharks, tune into Discovery at 9 pm/ET for the continuation of last night's premiere.