Robert Irwin, the son of the much-loved Aussie crocodile hunter Steve Irwin who tragically passed away in 2006, has left fans utterly amazed after showcasing a pair of tighty whities in a fresh photo shoot.

The 21-year-old - who has clearly followed in his father's footsteps by becoming a conservationist, TV presenter, zookeeper, and wildlife photographer - has recently collaborated with Bonds, an Australian underwear brand that has been around since 1915, and is now making its official debut in the US market.

This campaign, fittingly named 'Made for Down Under,' features Robert posing with real snakes and crocodiles while wearing various colors of boxer-style undies.

Robert Irwin, 21, left fans stunned with his latest Bonds underwear photoshoot (Bonds)

Earlier today (3 April), PEOPLE magazine released a series of exclusive photos of Robert promoting the collection, and naturally, fans were eager to share their reactions to the intriguing images, with one Instagram user commenting: "Suddenly I'm obsessed with crocodiles."

"Whoa! When did this guy become so incredibly hot?" exclaimed another, while a third added: "Crikey!"

Another chimed in: "Wowzer!!!!!!"

"Lord have mercy!" exclaimed yet another fan, while someone else commented: "Oh lawd. When did that happen!?"

However, many were particularly captivated by the second image in the photo set - specifically, Robert's left shoulder.

Can you spot the eight-legged critter on Robert's left shoulder (Bonds)

At first glance, it seems like he has a spider tattoo just above his bicep.

However, upon closer inspection, it's evident that the creepy-crawly is real!

"At first, I thought the spider was a tattoo!" noted another fan, while a final Instagram user admitted: "Not me thinking the spider on his arm was a tattoo and not a real one!"

Discussing his choice to collaborate with Bonds, Robert told the outlet that he didn't hesitate when he got the call.

Robert said he had no hesitation when he got the call to be in the campaign (Bonds)

"It was a pretty immediate yes," he revealed.

"I wish I could say I was very suave and cool about the whole thing, but I was like, 'Yes! Let's do it!' Because Bonds is an absolute icon in Australia," he continued.

"Also, I'm at this point in my life where I'm trying to engage in as many different and exciting ventures as possible, and if it's something that gives me a little bit of nerves, something I've never done before and it's a bit of an adrenaline rush? That's exactly what I want to pursue."

Well, it's clear Robert can now proudly add 'underwear model' to his ever-growing list of careers!