The 21-year-old conservationist has said it is an honour and a privilege to be take part in the 34th season of the hit US reality show because seeing his sister Bindi, who won the competition in 2015, dance with her pro partner Derek Hough in the ballroom at age 11 made him want to do it.
"I remember being a little 11 year old - little 11 year old Robert about this big with a little bowl cut, you remember that," Irwin told Hough, who is now a judge on show.
"And watching you and Bindi just having the most incredible time, lighting up the dance floor, I just thought, 'One day that's going to be me'."
The son of the late 'Crocodile Hunter' Steve Irwin is the first celebrity confirmed as a cast member on the 2025 show, with the rest to be announced at a later date.
Although no premiere date has been confirmed for season 34, Dancing With the Stars normally starts airing in mid-September.
It is not the first time Irwin will be dabbling in reality TV as he has already had his fair share of the genre in the past.
This includes starring in the Irwins' Australian Zoo documentary series Crikey! It's the Irwins from 2018 until 2022, and more recently, co-hosting the 2024 series of the Australian version of I'm A Celebrity ... Get Me Out Of Here!' with Julia Morris.
And as their friendship is so strong, he called Morris an "honorary Irwin".
"Julia's a bit of a Queenslander at this point," he told TV Week.
"We shot the promo at the zoo and hosted our gala.Â
"I mean, Julia has got her own khaki uniform. She's an honorary Irwin at this point."