Bindi Irwin Shares heartfelt photo of her family on her 18th birthday

Bindi Irwin has grown up right before our very eyes.

The late Steve Irwin’s daughter turns 18 today, and she used her special day to pay tribute to her family and late father Steve Irwin.

She shared a childhood photo of her father and her mother, taking a moment to acknowledge her progress over the years.

"Well today marks 18 years of life for me, here in Australia and I really don't know where to begin in thanking so many people for an unforgettable journey so far. So I think that I'll start here, with this photograph," Irwin wrote. "This photo was taken within the first year of my life. To be perfectly honest life has changed in a million ways since this photograph was taken. Along the way we gained another incredible part of our family, my brother Robert."

"Our conservation work with Wildlife Warriors took off around the world. Our home, Australia Zoo continued to expand and has become the greatest zoological facility on planet earth. Our Dad, Mum's soulmate and a superhero for us all, passed away. However, since this photo was taken, 18 years ago, one life ingredient has remained, unchanged, unbreakable," Irwin continued.

"That is the unconditional love that is shared between my beautiful little family and the loyalty we have to each other and everyone else who has taken this journey with us. I don't think that when this photo was taken even my beautiful parents could have known what life would evolve. I know that I am endlessly grateful for the love and light I have been given since Day 1 of my life."