From flab to fab! Big Brother's Chad Hurst reveals he was bullied in school for being the 'fat kid'... before losing the weight and becoming a model

His chiseled abs and perfect jawline have made him a popular contestant among female Big Brother viewers.

But Chad Hurst had to work hard for his Adonis-like physique.

The reality star told TV Week on Monday that he'd been bullied as a child for being overweight, before he completely transformed his body. 

Secret past: Big Brother's Chad Hurst (pictured) was bullied in school for being the 'fat kid' - before losing the weight and becoming an international model

Secret past: Big Brother's Chad Hurst (pictured) was bullied in school for being the 'fat kid' - before losing the weight and becoming an international model

'Growing up, I was the fat kid,' he confessed.

'I was pale and freckly, and had bleached hair that went a bit ranga. I got duct-taped to a tree once. They used to call me Choad, Little Blob and Fatty. I struggled.' 

At 15 years old, Chad started working out at the gym and went from 90kg to 75kg. 

Bullied: Chad told TV Week magazine that other children had picked on him at school. 'They used to call me Choad, Little Blob and Fatty,' he confessed. Pictured as an overweight child

Bullied: Chad told TV Week magazine that other children had picked on him at school. 'They used to call me Choad, Little Blob and Fatty,' he confessed. Pictured as an overweight child

After becoming 'addicted' to lifting weights, he ended up putting the weight back on in muscle, eventually tipping the scales at 102kg with just seven per cent body fat.

After being told to lose 20kg in order to pursue a career in modelling, Chad 'stopped lifting weights' and instead focused on doing 'cardio every day'. 

Once he dropped some of the muscle, his career hit new heights and he was eventually sent overseas for work. 

The transformation begins: At 15 years old, Chad started working out at the gym and went from 90kg to 75kg. Pictured: Chad as an overweight child
The transformation begins: At 15 years old, Chad started working out at the gym and went from 90kg to 75kg. Pictured recently

The transformation begins: At 15 years old, Chad started working out at the gym and went from 90kg to 75kg. Pictured: Chad as an overweight child vs recently

Despite his successful modelling career, Chad still worries about his body image.

'It's a cut-throat industry. It's not good for the mental health,' he said. 

'But now I'm established, it's more about being happy. I have a healthy life, but I can have some beers with the boys and not worry about having a six-pack all year round.'

Body conscious: Despite his successful modelling career, Chad still worries about his body image. 'It's a cut-throat industry. It's not good for the mental health,' he said

Body conscious: Despite his successful modelling career, Chad still worries about his body image. 'It's a cut-throat industry. It's not good for the mental health,' he said

Chad is one of six housemates left vying for the $250,000 cash prize on Big Brother.

Australia will ultimately decide who wins by voting for one of three remaining contestants during the live finale, which airs later this month.

Big Brother continues Monday from 7:30pm on Channel Seven

In it to win it: Chad is one of six housemates left vying for the $250,000 prize on Big Brother

In it to win it: Chad is one of six housemates left vying for the $250,000 prize on Big Brother