She’s the mum of four kids who rose to fame on controversial relationship experiment Seven Year Switch.
Since appearing on the Channel Seven show, Cass has been open about her fitness journey following the birth of her children.
And in a jaw-dropping throwback pic, Cass showed off her impressive post-baby body after having eldest daughter Ramani.
She wrote in the caption: ‘Throwing it back 8 years to a 27 year old Me! Post baby#1, a body that only required minimal exercise like walking squats and sit-ups to condition! Oh how times have changed!!’
‘I wanted to share this with those of you who think I'm working some kind of miracle over here with my current transformation progress.
‘The reality is I was always blessed with great genes and I'm still lucky enough to have some muscle memory which is starting to show in my current pics.
‘I'm not playing down the fact that I have now had 3 more babes and I'm working harder than I ever have in my life and I live with lifelong hypothyroidism, which means it makes it harder to shred the weight and fluid, but it does mean my body is going to respond a lot quicker with training and diet to get results.’