Robert Irwin left The Project host Sarah Harris blushing as he made an appearance on the Channel Ten show on Sunday night.
The celebrity conservationist, 21, was presenting the show as a guest panelist when Sam Taunton challenged him to an arm wrestle.
‘I reckon I could beat you in an arm wrestle,’ Sam said.
‘You reckon. Do you want to put that to the test right here, right now?’ Robert responded.
The I’m A Celebrity host then removed his jacket to reveal his bulging biceps in a tight white T-shirt, leaving Sarah visibly flustered.
‘Let’s go,’ Robert said before winning the challenge.
Robert Irwin (pictured) left The Project host Sarah Harris blushing as he made an appearance on the Channel Ten show on Sunday night
An impressed Sarah cheered Robert on before Sam joked: ‘I hope my girlfriend wasn’t watching that because a 21-year-old just bet me.’
Viewers flocked to social media to praise the conservationist on his impressive skills.
‘That’s Steve Irwin’s son, what made you think a mere human stands a chance?’ one person wrote.
‘No son of a crocodile hunter is losing an arm wrestle to a human haha,’ another said.
‘I knew the guy was doomed before Robert took the jacket off,’ a third wrote while one added: ‘Never challenge a man who wrestles crocodiles.’
Elsewhere in the show, Robert shared his first memory of his late father Steve Irwin.
The I’m a Celebrity host told how he recalled that Steve, who died in 2006, would treat him and his sister Bindi with a spin on his motorbike every morning.
Robert said these little trips would be capped off with a visit to the ice cream shop.
He was presenting the show as a guest panelist when Sam Taunton challenged him to an arm wrestle. Robert the removed his jacket to reveal his bulging biceps, leaving Sarah flustered
An impressed Sarah cheered Robert on before Sam jokingly added: ‘I hope my girlfriend wasn’t watching that because a 21-year-old just bet me’
The Wildlife Warrior shared the sweet memory a day after what would have been Steve’s 63rd birthday, February 22.
‘It’s always amazing to me to see the global reaction and impact dad has to this day,’ Robert said in his tribute to his dad during the The Project.
‘It’s very, very special.’
Asked to share his ‘earliest memory’ Robert was quick to share a sweet story.
‘It’s funny my earliest memory of dad was every morning – didn’t matter [whether] it was rail, hail or shine – he would load up Bindi and I on the front of his motorbike and we would go rip around [Australia Zoo] and get ice cream’ he said.
‘I just remember being on the front of the motorbike covered in ice cream just loving life.’
The Crocodile Hunter tragically died in 2006 at the age of 44 after being struck by a stingray.
