Kate Beckinsale is looking hot, hot, hot!

The actress showed off her killer bikini bod in a new vacation snap posted on Instagram on Monday.

WATCH: Kate Beckinsale Flaunts Incredible Figure in Sexy Bathroom Selfie

Slaying a strapless red-and-white bikini, the 43-year-old Total Recall star lies on a white net suspended over sparkling, blue water.

“Float float and some funny marks on your bum when you get up,” the British beauty captioned the photo.

In another post, on Sunday, Beckinsale rocked a colorful, flowery bikini and declared she was “happy oh happy.”

NEWS: Kate Beckinsale Says She’s ‘Never Actually Had an Entire Glass’ of Alcohol

So, what’s the secret to her fabulous figure?

We’re afraid it involves avoiding alcohol -- Beckinsale admitted she has never had a whole glass of “anything alcoholic,” during a recent interview with Shape magazine.

See another impressive selfie of the star below.