Cameron previously shared that David helped her get over her "purity complex."
The actress and singer, 29, showed off a smoldering bikini look during a Mediterranean vacation with her boyfriend, Damiano David, and some friends.
In snaps posted to Instagram on Saturday, Aug. 16, Cameron posed in a tiny red string bikini. The crochet swimwear featured pom-pom details and cheeky bottoms. The Descendants star wore her long, dark hair down -- and in one photo, gathers it into a ponytail at the back of her head.
Cameron's post also included a selfie of her wearing a partially sheer black bikini top, as well as a shot of David, 26, his chest tattoos on full display.
"🌞🍰 amici belli ♡ vita bella 🕊️," she wrote in the caption, which translates to "beautiful friends, beautiful life." David replied in a comment with "Noi ti amiamo ❤️" -- which means, "we love you."
Cameron shared more photos from the getaway a couple of days earlier. In the carousel, the star is seen paddle boarding with David, posing in front of a rocky wall with open water in the background and enjoying a boat day.
In a June cover story for NYLON, Cameron recalled how a beach day in Italy with the Måneskin frontman helped ease her fears around nude scenes for her upcoming thriller series 56 Days.
Cameron shared that David, who is Italian, has "way less hang-ups on the purity complex than Americans do."
"I went to the beach with him during a break while filming, and all the girls were taking their tops off," she recalled to the outlet. "He was like, 'Nobody's going to be staring at you. You're totally safe. If you want to, then you're free to do that.' Not that he was giving me permission, but he was like, 'You've never done this before. It's normal.' "
The "Boyfriend" singer added that the experience helped her "lose my shame around my own sort of ingrained weird thing about nudity, which I didn't think I had. I think it actually helped me fast-forward in my evolution."
56 Days is an adaptation of the Catherine Ryan Howard novel of the same name. Cameron will star in the Prime Video series alongside Avan Jogia as a couple whose whirlwind romance results in a murder.
Cameron and David first sparked romance rumors in September 2023 after she was spotted attending one of his shows with his Italian rock band. The following February, Cameron and David made their public debut as a couple at Clive Davis' annual Pre-Grammy Gala.
In a 2024 interview with Cosmopolitan, the actress said that she was "fascinated" by David the more she got to know him.
"He presents in a way that seems very easily digestible and then you spend two minutes around him and you realize he is the kindest, most generous, most innocent, most giving person," she shared. "He's like a 1950s gentleman, angel, teddy bear. He's the best person I've met in my life."