Married At First Sight Australia star Nic Jovanovic reveals cancer returned while filming the show

Married At First Sight Australia groom Nic Jovanovic was shocked and distraught to discover his cancer had returned while filming the reality show.

Jovanovic was first diagnosed with testicular cancer at the age of 24, which he revealed to his wife Cyrell Paule in an emotional conversation after their TV wedding.

Now, he's shared the shocking news that the cancer returned last year, forcing him to undergo surgery and chemotherapy shortly after production on MAFS wrapped.

"I was fit, I train, I eat well, I don't do drugs, I hardly drink. I was the epitome of healthy," he told 9Honey.

"Then to hear that, your whole world just turns upside down. Four years later... there was so much going on in my life, for it to come back, I'm still in shock that it came back."

Jovanovic, now 28, said he struggled to juggle the awful diagnosis with the fallout of his appearance on MAFS.

"I've got enough to deal with. After chemo, I was exhausted; my body was shutting down," he told TV Week.

The Newcastle electrician's relationship with wife Cyrell was riddled with fiery arguments and controversy, with the pair both choosing to leave the experiment last week. Jovanovic called the his reality TV marriage "horrendous", and that was before he discovered his health issues had returned.

"It was just crap," he said of his second diagnosis. 

"And I've had to deal with her and try to keep her calm. But what do you do?"

Jovanovic says he's now in remission and won't require any further chemotherapy for the time being.

"There's always somebody worse off out there. If I can help and get one person to go and get checked and save their life, then job done."

Married At First Sight Australia is currently airing on Sundays at 7pm and Monday -Wednesday at 7.30pm on Three. Previous episodes can be viewed online on ThreeNow.