Bindi Irwin Returns Home to Australia to Celebrate Her Brother's 12th Birthday

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Bindi Irwin is back Down Under!
The Dancing With the Stars champion headed back to Australia this week for her brother Robert's 12th birthday. In honor of his big day, the 17-year-old wildlife advocate posted a sweet birthday message, writing, "Happy birthday to the greatest brother on earth. I can't believe that it was an entire 12 years ago today when I met my little brother for the first time. Since that day he has grown up to be the smartest and most amazing boy on earth. Being a big sister is the greatest job of all. I love you so much, Robert. And I'll be here for you forever."

A source tells ET that after arriving in Australia on Monday, Bindi and her mom headed straight to the zoo, where they put on a show feeding the crocodiles.
Photo: Diimex
"Bindi seemed as high-spirited as ever and showed no signs of jet lag," the source added, noting that the reality star laughed off being asked whether she secretly married her boyfriend, Chandler Powell, who was not seen on Bindi's return. Robert was also in a good mood as he, at just 12 years old, got closer to a giant crocodile than we would EVER advise.
Photo: Diimex
After spending the past few months in the U.S. to compete on the ABC reality show, Bindi looked elated on a well-deserved trip home.
Photo: Diimex
Posting a picture of a gecko, Bindi wrote, "Missed these little guys outside my window. #GoodToBeHome."

Surely, Australia is glad to have you back, Bindi!
Bindi told ET in September that the support of her family and loved ones is what kept her going throughout the competition.
"I think that love and support is just something we all need in life," she said at the time. "We need those people to keep us going."
Watch the video below for Bindi's boyfriend's amazing message after her win.