Bindi, now 15, re-tweeted the sentimental message to all her followers.
Earlier in the day, however, the Irwin clan was spotted at The Gabba stadium, where they were announced as ambassadors for the Lions Football Club. Look at those smiles -- it definitely looked like they had a great afternoon.
The sighting comes after Bindi made a red carpet appearance at the AACTA Awards with her mom last week, going glam by sporting a cute dress and a smoky eye.
We love seeing how Bob and Bindi have grown through the years, see how they've changed in the gallery above!