Taking to Instagram, Bindi shared a snap of Grace with a birthday cake with the caption: "Can’t believe our beautiful Grace Warrior is almost ONE! Join us @AustraliaZoo this Friday March 25 for all the celebrations."
She shared some of the exciting events taking place including the grand opening of Camp Grace and the feeding of a crocodile in the Crocoseum. Kids under 14 also get free entry on the day.
There will also be cupcakes up for grabs and the opportunity to meet Bluey and Bingo who will be performing live.
Terri Irwin also shared details on Twitter, writing, "From free professional car seat checks, to free cupcakes, and opening Camp Grace with a fun playground."
"You are going to love sharing beautiful Grace Warrior's birthday. Friday March 25. See you for all the awesome free activities and shows."
Terri recently shared how Grace is carrying on Steve Irwin's legacy, telling Entertainment Tonight.
"I think she's got that determination that Steve had and that connection with wildlife," she said. "Because it is weird to see animals just gravitate to her. So she'll go out in the morning in the stroller, and all the kangaroos just gather around her like they're having a meeting."
Bindi added, "Oh my word, the koalas ... literally climb out of their trees to come see her."
She also said that while the koalas' claws are a little too sharp for hugging, Grace does try to reach out and touch them like her "risk-taker" grandfather with Terri adding, "That's Steve all over."
Bindi also shared that Grace's 'best friend' is an Aldabra tortoise named Igloo.
"He’s massive and the cutest," she shared. "When he sees Grace, he runs across his paddock, which is huge. If you're a tortoise, you can't really run very fast, but he does his best, runs across the paddock to see her and just sits. She tries to pat him, and she just ends up kind of like hitting him on the head."
Bindi added, "They love each other! It's the funniest thing you've ever seen. I love that my daughter's best friend is a tortoise."
Bindi and Chandler welcomed baby Grace into the world one year after tying the knot at Australia Zoo.
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