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The wildlife king proudly smiled at the camera as he put his arm around Grace's waist to support her in the photos.
Robert appeared on Australian morning show Sunrise last month, speaking about becoming an uncle after Bindi's gave birth to Grace.
Tender moment: Robert gazed lovingly at the cherubic tot, who was dressed in a cute bear onesie and a pink beanie
He also spoke about becoming an uncle after his sister, Bindi, welcomed daughter Grace earlier this year, telling Sam Mac: 'Mate, it's incredible.'
He added: 'I'm honoured I get to be a part of Grace's life and it feels like a new chapter for our family. It's really lovely.'