Bindi Irwin Shares Cutest Baby Pic of Brother Robert for National Brother's Day

Bindi Irwin is celebrating her little brother Robert for National Brother’s Day.

The sibling recognition day is May 24th, and the 20-year-old animal conservationist shared the cutest photo of her and her 15-year-old little bro.

“Remembering when my little brother really was ‘little’. He’s always had the most wonderful curiosity about the world. Watching him grow up has been such a blessing. #NationalBrothersDay,” Bindi captioned the pic. So cute!

The brother and sister duo, who are the children of famed Crocodile Hunter Steve Irwin, keep their father’s legacy alive every day with their continued work at the Australia Zoo and across the world. You can also check them out on their Animal Planet show, Crikey! It’s the Irwins.