Mighty crocodile hunter, Steve Irwin, was killed 10 years ago today when he was pierced in the chest by a stingray barb. While the world mourned the happy-go-lucky explorer’s passing, his death was most impactful on his family, particularly for children Bindi and Robert Clarence Irwin.

ULURU, AUSTRALIA - OCTOBER 2: Steve Irwin poses with his daughter Bindi Irwin October 2, 2006 in Uluru, Australia. (Photo by Australia Zoo via Getty Images)

BIndi has grown by leaps and bounds since Steve’s passing, going on to win season 21 of Dancing With the Stars and recently graduating from college.

Today, however, she took time out to remember the dad she lost at age eight.

Posting a photo that may predate even her earliest memory, Bindi wrote, “You’ll be my hero for my entire existence. I love you more than words can describe.”

We’re not gonna’ lie — we’re getting a little choked up over here: a sentiment that’s even further compounded by the knowledge that today is actually Australia’s Father’s Day.

Bindi’s mother and Steve’s wife, Terri Irwin, urged all Australians to treasure their dads, posting the following message to Twitter.

She also retweeted a Ruth Gordon quote posted by her daughter, which has hopefully given them both some comfort today.

Our warmest thoughts to the entire Irwin family.

Did Bindi’s words bring you to tears? Tell us over @BritandCo!

(Photos via Mark Metcalfe + Australia Zoo/Getty)