Chloe Grace Moretz on March 11, 2015
Credit: Rindoff/Dufour/Getty Images

Is Chloë Grace Moretz gearing up for her role in The Little Mermaid? If her latest Instagram posts are any indication, the answer is yes.

The star took to the social media platform yesterday to share a snap of herself lounging poolside in a blue string bikini during a getaway to Mexico with family and friends, and she looks very good. In the 'gram, the 18-year-old dips her feet in the shimmering water as she showcases her tight stomach muscles. "Sirena Mexicana," the actress wrote alongside the photo.

But Chloë isn't the only one with an enviable set of abs in the family—her older brother, Trevor Duke Moretz, sits beside her in the snap and also shows off his toned midsection. The 29-year-old shared the same picture as his little sister, which he captioned: "@chloegmoretz serving body-ody-ody #Mexico2016."

And if one photo showcasing their good genes wasn't enough, Chloë shared another from their vacation this morning, this one featuring the siblings posing on the edge of pool in their swimwear with the phrase: "La Vida Mexicana."