Jackie ‘O’ Henderson shows off her slimmed down figure after losing 18kg in five months 

Jackie ‘O’ Henderson has lost almost 20 kilos and she is super fit.

The radio queen enjoyed a game of tennis on Tuesday while she continued to work on her fitness.

The 48-year-old shows off her slim physique while working with a coach at her local tennis club in Sydney.

Jackie opted for an all-white ensemble with a simple T-shirt and matching shorts, as well as sneakers.

She added a pair of designer sunglasses and kept her makeup minimal while wearing her blonde locks around her face.

The KIIS FM star recently reflected candidly on her weight loss journey.

“Last year I joined WW again because I wanted to get my health back in order and I know their program works for me,” she said in a social media post.

“Losing weight was never about how I looked in the mirror, but rather about an overall sense of well-being and trying to get my energy levels back,” she continued.

“Five months ago I was 40 pounds heavier and had zero energy. My health suffered, so I decided to make a complete lifestyle change.’

Jackie said she lost weight because she incorporated daily exercise into her routine and ate a healthier diet.

She also quit alcohol, which the presenter said many of her followers may not believe.

Jackie added: ‘I’ve never felt better than I do now. I can honestly say I feel happier and healthier than I was in my 20s and I have more energy for myself and as a mom (and dog mom!)’

Jackie previously gave her listeners insight into her diet.

She revealed on The Kyle and Jackie O Show that she regularly skips breakfast, a practice known as intermittent fasting.

Jackie also avoids carbs and satisfies her hunger throughout the day by snacking on pre-cut pieces of steak.

Resisting splurging on high-calorie foods for lunch, she chooses to eat only “three small pieces of steak” and a few Vietnamese rice paper rolls with fish and cabbage.

For dinner, Jackie usually eats vegetables and a protein such as chicken or red meat.

Between meals, Jackie treats herself to smoothies and Starbucks Frappuccinos, a kind of blended iced coffee drink.

The mother of one has not always followed such a restrictive diet.

She told in February women’s Day before she got her health under control, she ate pizza, sausage rolls, and microwave meals from the gas station.