The pair, who announced in September that they were engaged, shared postcard-perfect Instagram photos of their vacay in the Bahamas, where they gamely soaked up some sun.
But it was Cuoco, 28, and Sweeting, 26, who appeared to generate much of the heat during the trip: The two packed on the PDA in the sweet photos, with one snapshot showing the actress kissing her man on a dock as they basked in a golden tropical glow.
"Dream vaca w my love @ryansweething #nofilter," she captioned the radiant pic.
Another photo, also posted on her Instagram page, showed her riding piggyback on her man as they head toward the surf.
Sweeting, for his part, uploaded some snapshots of his own, including a playful photo of them in the water, as well as a candid pic of his funnylady fiancée mugging it up for the camera.
Although the Big Bang Theory actress has largely remained mum about her nuptials, she has been getting into the wedding spirit: During a girls-only getaway to Palm Springs, Calif., on Nov. 16, the betrothed star posed for pics in a "Bride"-emblazoned tank top and a mini veil.