Rebel Wilson shows off her shrinking frame in skintight activewear while exercising in Sydney

How cheeky! Rebel Wilson shows off her shrinking frame in activewear after revealing she wants to be Australia’s next Bachelorette

She’s vowed to focus on her health and make ‘positive changes’ in 2020.

And on Thursday, Rebel Wilson showed off her incredibly shrinking frame as she shared a cheeky selfie with her Instagram followers.

The 40-year-old Pitch Perfect star appeared to be making the most of the sunny weather while she enjoyed a walk outdoors in Sydney.

Fun day out! Rebel Wilson, 40, (pictured) continued to show off her shrinking frame in activewear on Thursday after revealing she wants to be Australia’s next Bachelorette

‘Australia you cheeky possum!’ she wrote, uploading a photo of herself with her back to the camera, while she enjoyed harbourside views.

Rebel opted for a matching all-grey skintight ensemble which she paired with a large straw hat.

In a second, Rebel showed off her natural complexion with a makeup-free selfie while she appeared to be listening to music.

'Australia you cheeky possum!' she wrote, uploading a photo of herself with her back to the camera, while she enjoyed harbourside views

‘Australia you cheeky possum!’ she wrote, uploading a photo of herself with her back to the camera, while she enjoyed harbourside views

Rebel recently said she has set herself an ambitious weight loss goal for the coming months.

The Bridesmaid star, who is usually quite guarded with her private life, wants to slim down to 75kg (11.8 stone, or 165 pounds).

In a post shared to her Instagram, Rebel said: ‘Even if you have to crawl towards your goals, keep going – it would be worth it.

'I'm trying to get to 75kg': Last month, Rebel Wilson revealed she had set herself an ambitious weight loss goal for the coming months

‘I’m trying to get to 75kg’: Last month, Rebel Wilson revealed she had set herself an ambitious weight loss goal for the coming months

‘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.’

‘Good things are coming your way,’ she then encouraged her followers.

Her cheeky post comes after Rebel revealed she’d love to become Australia’s next Bachelorette. 

'I've turned into such a romantic': It comes after Rebel revealed she'd love to become Australia's next Bachelorette to 'represent real-looking women' on the Channel 10 show

‘I’ve turned into such a romantic’: It comes after Rebel revealed she’d love to become Australia’s next Bachelorette to ‘represent real-looking women’ on the Channel 10 show

However, she joked that she’s unsure if Channel 10 could afford her $20million fee. 

‘I’ve turned into such a romantic. I’m not ashamed to admit that I watch and love shows like The Bachelor and Bachelorette,’ said Rebel in the interview.

When asked if she’d consider signing up herself, she laughed: ‘My price is $20million so I don’t think [Channel 10] can afford it… I’m not going to expose myself publicly in that way for a low price.

‘But I think it’d be interesting to represent a more real-looking woman as the Bachelorette. I think that’d be a really positive message and I think people would find it more interesting.’

Kicking goals: Rebel works out six days a week with the help of a personal trainer. Pictured in 2011

Kicking goals: Rebel works out six days a week with the help of a personal trainer. Pictured in January

Kicking goals: Rebel currently works out six days a week with the help of a personal trainer. Pictured left in 2011, and right in January this year