The pair were joined by two other couples: Blake Lively and Ryan Reynolds, and Swift’s childhood friend Britany Maack and husband Benjamin LaManna, who recently had the Shake If Off Singer as bridesmaid at their wedding.
The couple was also seen passionately kissing in a Polaroid collage shared by one of Swift’s close friends on Instagram.
Swift spent the Independence Day weekend celebrating at her Rhode Island mansion with a large group of her famous friends, including Gigi Hadid, Karlie Kloss, Cara Delevingne, Martha Hunt and Australian actress Ruby Rose.
For the special occasion, Hiddleston, who stars in Thor, was seen with a faux heart tattoo with a "T" on his arm and also wore an "I [heart] T.S." tank top while he frolicked in the ocean with Swift, before holding hands with her while sliding down a giant ‘Taymerica’ slide in the singer’s backyard.
It’s been a whirlwind romance for the couple, who, despite only dating for a couple of weeks, have already travelled to meet each other’s parents in Nashville and England respectively.
They also recently holidayed together in Rome, where they kissed and held hands touring the Colosseum.