Rebel Wilson slips into a VERY low-cut swimsuit as she enjoys beach day with matching sister Annachi

She has been jet-setting across the world with her new boyfriend, Jacob Busch.

But Rebel Wilson made some time for her little sister Annachi as the sisters hit the beach for a fun-filled day in sunny Mexico on Tuesday.

The 40-year-old Australian showed off her significant weight loss in a stylish low-cut green swimsuit as she posed for a slew of Instagram images with the matching 29-year-old. 

‘Hola Mexico’: Rebel Wilson made some time for her little sister Annachi as the sisters hit the beach for a fun-filled day in sunny Mexico on Tuesday

Rebel, who has lost roughly 20kg this year, looked every inch the blonde bombshell in the sexy collared one-piece by Magicsuit Swimwear.

The comedienne ensured to pull her zipper low enough to show off her ample assets.

She completed the sultry beach look by throwing her locks into a ponytail and donning a pair of chic shades and a red LA Lakers baseball hat.

Inspired by her famous sister’s look, Annachi also looked incredible in the matching swimwear.

Taking the plunge! The 40-year-old Australian showed off her significant weight loss in a perilously plunging green swimsuit

Taking the plunge! The 40-year-old Australian showed off her significant weight loss in a perilously plunging green swimsuit

Getting the green light! Rebel, who has lost roughly 20kg this year, looked every inch the blonde bombshell in the sexy collared one-piece by Magicsuit Swimwear

Getting the green light! Rebel, who has lost roughly 20kg this year, looked every inch the blonde bombshell in the sexy collared one-piece by Magicsuit Swimwear

Sister, sister! The comedienne ensured to pull her zipper low enough to show off her ample assets as she posed away with her sister

Sister, sister! The comedienne ensured to pull her zipper low enough to show off her ample assets as she posed away with her sister

The sisters looked like they were having the time of their lives as they posed for social media snaps. 

This comes after Rebel shared a mirror selfie on Monday following a weekend of Halloween fun with her boyfriend.

The star wore some satin look cropped leggings and a sheer cream sweater as she posed in the mirror showing off her slimmed down figure. 

'Sister time': Rebel appeared to be having a whale of a time as she caught up with her rarely seen younger sister, Annachi

‘Sister time’: Rebel appeared to be having a whale of a time as she caught up with her rarely seen younger sister, Annachi

Transformation: This comes after Rebel shared a mirror selfie on Monday following a weekend of Halloween fun with her boyfriend. The beauty  is now only eight kilograms from her goal weight

Transformation: This comes after Rebel shared a mirror selfie on Monday following a weekend of Halloween fun with her boyfriend. The beauty  is now only eight kilograms from her goal weight

Over the weekend Rebel got dressed up with boyfriend Jacob to celebrate Halloween.

‘HAUNTe COUTURe,’ the Bridesmaids actress captioned a post showing the duo standing side-by-side in formal attire while donning skeleton-inspired face paint. 

Rebel and Jacob met through friends in 2019 and started dating in September.

They were involved on a casual basis prior to this but their relationship took a serious turn when Rebel returned to the United States.

Meanwhile, Rebel says her health journey has ‘made fashion even more fun’. 

The Pitch Perfect star’s weight loss has made her much more ‘adventurous’ when it comes to her fashion choices. 

Spooky: The actress celebrated Halloween with boyfriend Jacob Busch, 29, over the weekend

Spooky: The actress celebrated Halloween with boyfriend Jacob Busch, 29, over the weekend

A source told People magazine: ‘Her health journey has made fashion more fun for her and she loves trying new things, new designers and being adventurous.’ 

And Rebel is now only eight kilograms from her goal weight. Taking to Instagram, she wrote: ‘Thanks for all the love so far on my ‘Year of Health’ journey .

‘When I was reaching for the candies last night after dinner I thought to myself ‘hmmmm… better not’ and had a bottle of water instead x 8kg’s to go until I hit my goal – hopefully I can do it by the end of the year x (sic)’ 

Rebel had previously revealed she is aiming to get to 165 pounds, and though she admitted she faces ‘constant setbacks’, she’s doing everything in her power to succeed and lose the weight she wants. 

Love: Rebel and Jacob met through friends in 2019 and started dating in September when the actress returned to the US

Love: Rebel and Jacob met through friends in 2019 and started dating in September when the actress returned to the US

Alongside a snap of herself in her gym wear in her living room, Rebel wrote: ‘Even if you have to crawl towards your goals, keep going x it will be worth it. 

‘Try and give a little bit of effort each day…I know some days are frustrating as hell, you feel like giving up, you get annoyed at the lack of progress…but good things are coming your way. What are your goals this year? 

‘I’ll be honest with you guys – with my ‘Year of Health’ mission I’m trying to get to 75kg’s (165 pounds) and career wise am trying to get one of my movies into production before the end of the year! 

‘Both of these things are requiring a daily effort and there’s constant set backs – but I’m working hard. (sic)’ 

Laughs: The Pitch Perfect star dressed up as a coronavirus-destroying warrior called Rona for Halloween

Laughs: The Pitch Perfect star dressed up as a coronavirus-destroying warrior called Rona for Halloween