Rebel Wilson’s incredible weight loss is revealed – after the star vowed to slim down to 75kg

She recently vowed to make 2020 her ‘year of health’.

And it seems all that the hard work in the gym is paying off for Australian actress and comedian Rebel Wilson.

Dietitian and exercise physiologist Kate Save told Daily Mail Australia that she believes Rebel has lost up to 18kg (40lbs or 2.8 stone).

Save, who is the director of Peninsula Physical Health and Nutrition and CEO of Be Fit Food, arrived at the estimation by studying before-and-after photos of Rebel. 

‘My team aligned at 16 to 18kg [weight loss] given her height is quite short,’ she told Daily Mail Australia.  

Rebel, who hopes to slim down to 75kg, updated fans on her health and fitness journey during an interview on Sunrise on Monday. 

‘There’s been a lot of working out, which was hard with the coronavirus restrictions,’ the Pitch Perfect star said.

Rebel added that she was happy gyms were finally reopening in Australia because she was ready to step up her training and ‘pump iron’.

‘I had to go out to the park and lie on the dirt doing my sit-ups,’ she laughed. ‘It’s a bit brutal, and it’s getting cold in the mornings.’

Last month, the Hollywood star vowed to slim down to 75kg (165lbs or 11.8 stone). 

‘Even if you have to crawl towards your goals, keep going – it would be worth it,’ Rebel wrote on Instagram.

‘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.’

Rebel’s personal trainer, Jono Castano Acero, recently shared the star’s workout routine with E! Australia.

During a typical week, she does a combination of HIIT workouts, mobility, weights and resistance, and has just one day per week of rest.

‘Rebel and I are just focusing on enjoying training and getting the body moving,’ he said, adding that she was ‘pleasure’ to work with because of her sense of humour.

In March, Jono told Daily Mail Australia his top tips to help people lose weight.  

The Sydney-based gym buff said that people should be working out for at least 45 minutes a day to shed the kilos.

And while calorie intake is important, dieters don’t have to sacrifice cheat days.

‘At a minimum, I preach to always get in 45 minutes daily. Whether that be a workout, a walk or something else that’s physical that you enjoy doing,’ Jono said.

Jono, 28, believes that high-intensity interval training (HIIT) is the best form of exercise for weight loss.

‘What I do for most of my clients looking to shed some pounds is incorporating a mix of different exercises into their session. Short bursts of intense cardio combined with resistance training and weights is my special formula,’ he said. 

‘It fires up the heart rate and calorie burn as well as builds lean muscle so your body continues to burn calories at a high rate throughout the day.’

Diet is just as important as exercise, and Jono recommends eating at a ‘calorie deficit’ if you want to lose weight.

‘Think about it, if you train one hour a day, it’s very important what you do in the other 23 hours,’ he said.

‘If you’re looking to shed some pounds, it’s important to eat at a calorie deficit meaning your total daily calorie expenditure needs to be higher than your calorie intake through what you eat.’

But cheat days are still okay, so long as you burn off the junk food with exercise.

‘Find what works for you and stick to it,’ he said. 

‘Try not to cheat during the suggested time until you feel confident enough to have a treat and know that you will get right back on it after.’