Bindi Irwin continues to hold dear the memory of her beloved father.
Ahead of the 10-year anniversary of her father's death, Steve Irwin, the former Dancing with the Stars alum took to social media on Saturday to share a touching tribute.
WATCH: Bindi Irwin Opens Up About Anxiety After Dad's Death, Raves Over 'Old-Fashioned' Boyfriend: 'Het Gets My World'
"You'll be my hero for my entire existence. I love you more than words can describe," Bindi, 18, tweeted, alongside an adorable father-daughter baby photo.
Last month, Bindi celebrated her 18th birthday and shared another touching post on social media.
"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," Bindi captioned the photo. "So I think that I'll start here, with this photograph."
WATCH: Bindi Irwin Pays Tribute to Her Mom and Late Father While Celebrating 18th Birthday: 'I Am Endlessly Grateful'
On Friday, Irwin's family released a heartfelt letter that the Crocodile Hunter wrote to his parents, Bob and Lyn. The note -- which will be published in Bob's upcoming memoir, The Last Crocodile Hunter: A Father and Son Legacy -- was tucked away in a book and was discovered earlier this year.
Written 12 years before his untimely death in 2006, the letter reads, "At 32, I am finally starting to figure it out. In good times and in bad, you were there. Your strength and endurance to raise me will not go unrewarded."
RELATED: Steve Irwin's Heartfelt Letter to His Parents Discovered: 'My Love for You Is My Strength!'
For more on Irwin's letter and upcoming memoir, available Oct. 25, watch the video below.