Bindi Irwin Has 20 Koala-fying Reasons to Eat Cake

7/24/2018 6:47 AM PDT

Bindi Irwin Celebrates Her 20th Birthday at Australia Zoo

Bindi Irwin ushered in her 20th year of existence on this Earth celebrating at HER happiest place on Earth ... the zoo!!

Steve Irwin's daughter was all smiles celebrating her birthday Tuesday at the Australia Zoo. She posed in front of a pretty cool cake and next to her little brother, Robert, and her mom, Terri. And just like her 18th birthday celebration, this bash, too, was a total croc!! 

Fans also got in on the action ... the selfie action, that is. Hard to believe she's all grown up. Where'd the time go?!