Rebel Wilson displays 3-stone weight loss in skimpy swimsuit with billionaire boyfriend

Rebel Wilson has sent temperatures soaring as she paraded her incredible figure on a beach getaway with her boyfriend.

Rebel and Jacob Busch made their romance public in September, the 40-year-old actress recently gushing over the "great view" she had of his chiselled abs.

And the two have been snapped strolling along the sandy shore in Mexico, Rebel rocking a figure-hugging one-piece swimsuit while shading her face with a chic white sunhat.

Jacob, meanwhile, gave a good look at his ripped torso as he walked in nothing but a pair of trunks.

Rebel dubbed 2020 "the year of health", putting herself on a strict diet and exercise regime over lockdown that even included running up and down the steps of the Sydney Opera House.

Rebel Wilson and Jacob Busch make a gorgeous couple (BACKGRID)

She's thought to have shed a huge three stone.

Rebel's kept fans updated on all her vigorous workout sessions, including a video of her flipping a tyre, joking that she's "coming for" famously ripped Aussie brothers Chris and Liam Hemsworth.

Chatting to an Australian radio station, she told: "Obviously a lot of the TV shows and movies got shut down, so what I was going to do has been delayed so I'm just getting ripped.

Rebel's thought to have lost around three stone during her 'year of health' (BACKGRID)

The star committed to a strict exercise and diet regime (BACKGRID)

"I'm exercising every day. You've got to get on the bandwagon on being ripped.

"I was actually doing all this outdoor stuff like running up and down the Sydney Opera House stairs."

And Rebel made a cheeky joke about how she's getting plenty of "exercise" with Jacob.

The pair displayed their enviable figures at the beach (BACKGRID)

The couple strolled along the sandy shore (BACKGRID)

Meanwhile, People reported that she was taken with a nutrition regime known as the Mayr diet.

"It's an approach that that eliminates food intolerances," read the report, "reduces sugar, encourages eating whole foods slowly, boosts the immune system and reduces inflammation."

And fitness trainer Jono Castano, at the heart of her incredible transformation, told Yahoo! Lifestyle : "I think with any type of transformation you shouldn't always look at the easiest option, you know, two months is not enough time to be able to change your body.

"My advice is to keep your goals realistic, short and then achieve them, and progress from there."