Steve, who passed away on September 2006 when a stingray pieced his heart with it's barb, was born on his mother's birthday in 1962 when she was just 20-years-old.
Bindi captioned an adorable image of the two, 'Happy Birthday to my dad and grandmother.
'I wish so much that I could give you birthday hugs. You are both in my heart today and I hope you are celebrating together ❤️'
Fans of the young conservationist were quick to flood the post with well-wishes.
'Thinking you all today,' one wrote.
Another added, 'Your papa was truly inspiring, as a wildlife warrior and family man!'
Bindi, her brother Robert, and their mother Terri, have continued to follow in Steve's footsteps. Most recently, the family are creating a new Animal Planet series, which will follow the family as they run Australia Zoo and travel the world protecting and celebrating animals.
Bindi has also hosted the Discovery Kids series Bindi, the Jungle Girl and co-created a series of books called Bindi Wildlife Adventures, while Robert has hosted the wildlife series Wild But True on Discovery Kids and has introduced exotic animals to Jimmy Fallon on the comedian’s late-night show.