Kim Kardashian once famously sobbed over losing a diamond earring in the ocean on “KUWTK” — but this time, it looks like she’s dropped something way more valuable into the water … Lewis Hamilton.

Check out these pics — Kim was right there with the F1 champ in the Malibu waters Monday … locking lips, getting cozy, and judging by that grin, looking fully smitten!

Kim kept it beachy in a rolled-down wetsuit and bikini top — showing off those signature curves — while Lewis stayed hands-on the entire time.

The vibe was straight-up romance — waves crashing, sandy strolls, the whole cinematic moment — like any loved-up couple … except, yeah, this is Hollywood’s newest A-list pairing.

The perfect pair officially confirmed their romance at Superbowl LX — but with this outing, their recent Coachella sighting, and everything in between … it’s pretty clear things are heating up even more.