One of Australian Survivor's biggest stars is set to become a father.

Nick Iadanza, who was a fan favourite on the first season of the series, has announced that he and wife Christina are expecting their first child.

The happy couple posted a selfie to social media last week, which showed Christine holding up a sonogram to the camera.

The tribe has spoken... you're pregnant! Australian Survivor's Nick Iadanza is expecting his first child with wife Christine

'Baby Iadanza coming Christmas Eve!' wrote Nick, 30.

The English teacher was swamped with well wishes from various Survivor stars, including Kristie Bennett, who beat him to the $500,000 prize on their season.

'Congratulations!' she gushed. 'How exciting! What a gem it will be.'

Flashback: Nick was a fan favourite on the first season of Australian Survivor in 2016

'What a lucky kid to be born into such a family!' Several of Nick's Survivor co-stars rushed to social media to congratulate him

'This is amazing news!' exclaimed season two's Anneliese Wilson. 'What a lucky kid to be born into such a family.'

Felicity 'Flick' Egginton took to her own page to congratulate her former co-star by sharing a photo of herself and Nick together.

'You're going to make an amazing dad and Christine you're going to be the best mum! Congrats again you guys. PS My bet is a boy!' she wrote.

'You're going to make an amazing dad and Christine you're going to be the best mum!' Flick Egginton was among the former Survivor stars to congratulate Nick

Since appearing on Australian Survivor, Nick has become a podcaster and blogger for the world's most popular Survivor fansite, Rob Has a Podcast.

Channel Ten is currently teasing the third season of Australian Survivor, dubbed Champions Vs. Contenders, which will feature notable figures going up against everyday Aussies.

A number of famous faces have already been confirmed for the series, including Olympic athlete Shane Gould and women's AFL player Moana Hope.