Jackie ‘O’ Henderson shows off her slimmed-down figure as she takes her dog for a walk in Sydney

Jackie ‘O’ Henderson recently revealed she lost a whopping 18kg in just five months.

And on Sunday, the radio host, 48, showed off her slimmed-down figure as she took her dog Sadie for a walk in Sydney.

The WW ambassador showed off the results of her weight loss in beige pants and a white T-shirt as she went for a walk at Coogee Beach with her father Tony.

Jackie O completed her look with a pair of black sandals and wore sunglasses as she held her dog Sadie’s leash.

She tied her blonde locks into a high ponytail and wore a neutral makeup palette for the outing.

The mother-of-one recently spoke about her new diet on The Kyle and Jackie O Show and said she often skips breakfast, a practice known as intermittent fasting.

She also avoids carbohydrates, and satiates her hunger throughout the day by snacking on pre-cut pieces of steak.

‘I cook steak and slice it, and then I’ll just have a little sliver of steak if I’m hungry,’ Jackie said. 

She resists splurging on high-calorie foods for lunch, opting to eat just ‘three little slivers of steak’ and a few Vietnamese rice paper rolls containing fish and cabbage. 

Her co-host Kyle Sandilands was shocked by her small portion size, telling her: ‘A dog would eat more!’

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

In between meals, Jackie treats herself to smoothies and Starbucks Frappuccinos, a type of blended ice coffee drink.

The WW ambassador showed off the results of her weight loss in beige pants and a white T-shirt as she went for a walk at Coogee Beach with her father Tony

The mother of one hasn’t always followed such a restrictive diet.

In February, she told Woman’s Day she used to binge on pizza, sausage rolls and microwave meals from the petrol station before she took control of her health.

‘I was eating a lot of food that I could get in a hurry. You know, pizza and sandwiches and just takeaway, I wasn’t cooking myself,’ she said.

‘And I think it’s always best when you know what you’re putting into your body. I just got really lazy.’

Jackie ‘O’ recently revealed she lost a whopping 18kg in just five months. The mother-of-one spoke about her new diet on The Kyle and Jackie O Show and said she often skips breakfast, a practice known as intermittent fasting