Robert Irwin is sharing a heartfelt message to his sister Bindi Irwin, amid her endometriosis journey.

​Bindi, who was diagnosed with endometriosis in 2022, has been vocal about women’s health since then and openly shared her struggle with endometriosis, including the removal of 50 lesions from her body.

​Robert gushed over his sister's bravery and told People at the Disney 2026 Upfront, “Bindi's journey with endometriosis has been amazing because it's hard to battle through that. And it's easy to just let it be a silent kind of battle."

​The proud brother continued, “But she's decided to actually amplify that, to spread her story, to share that with people, to help other people. That's a brave thing. That's a challenging thing."

​The 22-year-old conservationist explained, "And endometriosis is a very hard thing to go through that so many people sort of suffer in silence or suffer undiagnosed. And I really just try and follow her lead. She's amazing. Anything that I can do to amplify this message of women's health that she spearheads so well, I mean, sign me up. I'm there."

The Dancing with the Stars winner added, "So I'm a very proud younger brother. She is amazing in everything she does, and I'm just here to back her 100%."

​It is pertinent to mention that Robert and Bindi's father was the iconic Australian conservationist Steve Irwin, famous as "The Crocodile Hunter."

​According to the website of Mayo Clinic, "Endometriosis is a condition in which cells similar to the lining of the uterus, or endometrium, grow outside the uterus."