Robert Irwin has caused a stir with his underwear campaign for Aussie brand Bonds, and Bindi Irwin has finally spoken out.
The 22-year-old wildlife star's steamy photos landed earlier this year in the US, turning heads and sparking headlines.
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On The Apple and The Tree podcast this week, Robert revealed that his sister was left speechless when she first saw the images.

He said, "When I showed Bindi and the fam the photos for the first time, it took a minute before you even said anything," adding that she looked genuinely shocked.
Bindi, 27, quickly reassured him, saying, "But I'm very proud of you," before joking about his new tagline.
"I think the new slogan is 'Clothes off for conservation,'" she quipped.
Robert was clearly entertained, replying, "Clothes off for conservation. I like that."
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Their mother Terri, 60, has also weighed in on Robert's modelling debut, according to New Idea.
A source told the publication that Terri was "a little surprised" by her son's decision to go shirtless for the shoot.
The insider added that Terri "voiced her concerns" because the campaign didn't align with the family's carefully maintained, family-friendly image.
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